{"id":296582,"date":"2026-02-18T15:51:51","date_gmt":"2026-02-18T10:21:51","guid":{"rendered":"https:\/\/www.aakash.ac.in\/blog\/?p=296582"},"modified":"2026-02-19T16:40:44","modified_gmt":"2026-02-19T11:10:44","slug":"physics-class-12-formula-sheet-with-derivations-and-key-concepts","status":"publish","type":"post","link":"https:\/\/www.aakash.ac.in\/blog\/physics-class-12-formula-sheet-with-derivations-and-key-concepts\/","title":{"rendered":"Physics Class 12 Formula Sheet with Derivations and Key Concepts"},"content":{"rendered":"<p>Physics is a scoring subject when you know the right formulas. You also need to understand where these formulas come from. This guide gives you a full formula sheet for Physics class 12. It also explains key ideas in simple words.<\/p>\n<p>Students often lose marks in the CBSE class 12 Physics paper because they forget formulas. They also struggle with derivations. With the right Physics class 12 formulas and derivations, you can score much higher.<\/p>\n<h2><span style=\"font-weight: 400;\">Why You Need a Physics Class 12 Formula Sheet<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A <\/span><b>Physics formula sheet<\/b><span style=\"font-weight: 400;\"> saves time. It helps you revise fast. It keeps all important formulas in one place.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">You must know:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Basic Physics formulas<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><strong>Long formulas<\/strong><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>All derivations of Physics class 12<\/b><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This is why every student should keep a neat formula list.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">What CBSE Tests in Physics<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">CBSE checks:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Concept clarity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use of <\/span><b>Physics formulas<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ability to write <\/span><b>important derivations Physics class 12<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Skill in solving numericals<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">You must prepare well for all <\/span><b>class 12 Physics chapters<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Chapterwise Formula and Derivation Table<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">This table gives a quick view of key topics. The \u201cClick Here\u201d column can be used in online notes or PDFs.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>Unit No<\/b><\/td>\n<td><b>Class 12 Physics Chapters<\/b><\/td>\n<td><b>Key Topics<\/b><\/td>\n<td><b>Click Here<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">I<\/span><\/td>\n<td><b>Electric Charges and Fields<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Coulomb\u2019s law, Electric field, Flux<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/physics\/electric-charges-and-fields\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">I<\/span><\/td>\n<td><b>Electrostatic Potential and Capacitance<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Potential, Capacitance<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/what-is-electrostatic-potential-definition-significance-and-implication\/\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">II<\/span><\/td>\n<td><b>Current Electricity<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Ohm\u2019s law, Resistance, Resistivity<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/physics\/electric-current\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">III<\/span><\/td>\n<td><b>Moving Charges and Magnetism<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Magnetic force, Biot-Savart law<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-4-moving-charges-and-magnetism\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">III<\/span><\/td>\n<td><b>Magnetism and Matter<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Magnetic materials<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-board-class-12-important-notes-on-the-chapter-magnetism-and-matter\/\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">IV<\/span><\/td>\n<td><b>Electromagnetic Induction<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Faraday\u2019s law, Lenz\u2019s law<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/physics\/electromagnetic-induction\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">IV<\/span><\/td>\n<td><b>Alternating Current<\/b><\/td>\n<td><span style=\"font-weight: 400;\">AC concepts, RMS values<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-7-alternating-current\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">V<\/span><\/td>\n<td><b>Electromagnetic Waves<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Properties, EM spectrum<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/physics\/electromagnetic-waves\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">VI<\/span><\/td>\n<td><b>Ray Optics and Optical Instruments<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Refraction, Lenses<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-9-ray-optics-optical-instruments\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">VI<\/span><\/td>\n<td><b>Wave Optics<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Interference, Diffraction<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-10-wave-optics\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">VII<\/span><\/td>\n<td><b>Dual Nature of Radiation and Matter<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Photoelectric effect<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/physics\/dual-nature-of-matter-and-radiation\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">VIII<\/span><\/td>\n<td><b>Atoms<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Bohr model, Energy levels<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-12-atoms\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">VIII<\/span><\/td>\n<td><b>Nuclei<\/b><\/td>\n<td><span style=\"font-weight: 400;\">Structure of nucleus<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-13-nuclei\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">IX<\/span><\/td>\n<td><b>Semiconductor Electronics<\/b><\/td>\n<td><span style=\"font-weight: 400;\">PN junction, Diode basics<\/span><\/td>\n<td><a href=\"https:\/\/www.aakash.ac.in\/ncert-solutions\/class-12\/physics\/chapter-14-semiconductor-electronics\"><span style=\"font-weight: 400;\">Click Here<\/span><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span style=\"font-weight: 400;\">Basic Physics Formulas You Must Know<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">These <\/span><b>basic Physics formulas<\/b><span style=\"font-weight: 400;\"> are used in many chapters.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Speed = Distance \/ Time<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Force = Mass \u00d7 Acceleration<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Work = Force \u00d7 Distance<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Power = Work \/ Time<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Energy = Work done<\/span><\/li>\n<\/ul>\n<p>These are part of all Physics formulas.<\/p>\n<h2><span style=\"font-weight: 400;\">Important Physics Class 12 Formulas from Each Chapter<\/span><\/h2>\n<h3><span style=\"font-weight: 400;\">Electrostatics<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Coulomb\u2019s law<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> F = k(q1q2)\/r\u00b2<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Electric field<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> E = F\/q<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These are core <\/span><b>Physics formulas<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Current Electricity<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ohm\u2019s law<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> V = IR<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Resistance<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> R = \u03c1L\/A<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These appear often in the <\/span><b>CBSE class 12 Physics paper<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Magnetism<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Force on charge<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> F = qvB<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Torque<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> \u03c4 = mB sin\u03b8<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Electromagnetic Induction<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Faraday\u2019s law<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> E = -d\u03a6\/dt<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">AC<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">RMS voltage<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> Vrms = Vmax\/\u221a2<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Optics<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lens formula<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> 1\/f = 1\/v + 1\/u<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Magnification<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> m = v\/u<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These are key <\/span><b>Physics formulas<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Dual Nature<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Photoelectric equation<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> E = hf &#8211; \u03c6<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Atoms<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Bohr energy<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> En = -13.6\/n\u00b2<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Nuclei<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Decay law<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> N = N\u2080e\u207b\u02e1\u1d57<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Semiconductors<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Current in diode<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> I = I\u2080(e\u1d5b\/\u03b7V\u1d40 &#8211; 1)<\/span><\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400;\">Physics Derivations Class 12<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">CBSE gives many marks for derivations. You must learn the <\/span><b>most important derivations in Physics class 12<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Some key ones are:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Coulomb\u2019s law<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Drift velocity<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Lens maker\u2019s formula<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Einstein\u2019s photoelectric equation<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Radioactive decay<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">These are part of <\/span><b>important derivations Physics class 12<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">How to Write Derivations<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Use this format:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Write the formula<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Explain each step<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Add units<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Draw a diagram<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">This helps in all <\/span><b>Physics derivations class 12<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><strong>Last-Minute Revision: Most Important Derivations for Class 12 Physics<\/strong><\/h2>\n<h3><strong>1. Coulomb\u2019s Law<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><br \/>\nForce between two point charges varies directly with product of charges and inversely with square of distance.<\/p>\n<p><strong>How to Prove (Exam Flow):<\/strong><\/p>\n<ul>\n<li>State proportionalities:<br \/>\nF \u221d q\u2081q\u2082<br \/>\nF \u221d 1\/r\u00b2<\/li>\n<li>Combine both:<br \/>\nF \u221d q\u2081q\u2082 \/ r\u00b2<\/li>\n<li>Introduce constant.<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296667\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141302.png\" alt=\"Coulomb\u2019s Law\" width=\"222\" height=\"74\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141302.png 222w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141302-150x50.png 150w\" sizes=\"auto, (max-width: 222px) 100vw, 222px\" \/><\/li>\n<li>Write final expression and mention direction (along line joining charges).<\/li>\n<\/ul>\n<h3><strong>2. Drift Velocity<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><\/p>\n<p>Expression for drift velocity and relation<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296668\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141616.png\" alt=\"Expression for drift velocity and relation\u00a0\" width=\"140\" height=\"40\" \/><\/p>\n<p><strong>How to Prove:<\/strong><br \/>\nForce on electron <strong>F = (- eE)<\/strong><br \/>\nAcceleration <strong>a = ( &#8211; eE\/m)<\/strong><br \/>\nUse<strong> v = at<\/strong> (where <strong>t = relaxation time \u03c4<\/strong>).<br \/>\n<strong>Obtain\u00a0<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296669\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-155202.png\" alt=\"\" width=\"142\" height=\"79\" \/><\/p>\n<p>Multiply by number of electrons to derive<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296668\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141616.png\" alt=\"Expression for drift velocity and relation\u00a0\" width=\"140\" height=\"40\" \/><\/p>\n<h3><strong>3. Force Between Two Parallel Wires<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><br \/>\nExpression for force per unit length.<\/p>\n<p><strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>First, find the magnetic field due to one wire.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296671\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-160051.png\" alt=\"Force Between Two Parallel Wires\" width=\"144\" height=\"79\" \/><\/p>\n<ul>\n<li>Apply Lorentz force formula on second wire.\n<ul id=\"attachment_296670\" class=\"wp-caption alignnone\" style=\"width: 258px;\">\n<li class=\"wp-caption-dt\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296670\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-155944.png\" alt=\"Force Between Two Parallel Wires\" width=\"258\" height=\"49\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-155944.png 258w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-155944-150x28.png 150w\" sizes=\"auto, (max-width: 258px) 100vw, 258px\" \/><\/li>\n<\/ul>\n<\/li>\n<li>Substitute value of B.<\/li>\n<li>Simplify to get F\/L expression.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296672\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-160217.png\" alt=\"Force Between Two Parallel Wires\" width=\"154\" height=\"89\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-160217.png 154w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-160217-150x87.png 150w\" sizes=\"auto, (max-width: 154px) 100vw, 154px\" \/><\/p>\n<h3><strong>4. Faraday\u2019s Law<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><br \/>\nInduced <strong>emf<\/strong> equals rate of change of magnetic flux.<\/p>\n<p><strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>Define magnetic flux <strong>(\u03a6 = BA cos\u03b8).<\/strong><\/li>\n<li>Consider change in flux with time.<\/li>\n<li>State experimental observation.<\/li>\n<li>Write<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296673\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-160824.png\" alt=\"Faraday\u2019s Law\" width=\"119\" height=\"76\" \/><\/p>\n<ul>\n<li>Explain negative sign using Lenz\u2019s Law.<\/li>\n<\/ul>\n<h3><strong>5. Lens \/ Mirror Formula<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><\/p>\n<p>Relation between u, v, and f.<\/p>\n<p><strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>Draw ray diagram.<\/li>\n<li>Use similar triangles.<\/li>\n<li>Write ratio of sides.<\/li>\n<li>Rearrange algebraically.<\/li>\n<li><strong>Obtain<\/strong><\/li>\n<\/ul>\n<p><strong>Mirror Formula:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296674\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161521.png\" alt=\"Mirror Formula:\" width=\"160\" height=\"83\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161521.png 160w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161521-150x78.png 150w\" sizes=\"auto, (max-width: 160px) 100vw, 160px\" \/><\/p>\n<p><strong>Lens Formula:<\/strong><\/p>\n<p><strong><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-296675\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161705.png\" alt=\"Lens Formula\" width=\"159\" height=\"73\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161705.png 159w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-161705-150x69.png 150w\" sizes=\"auto, (max-width: 159px) 100vw, 159px\" \/><\/strong><\/p>\n<h3><strong>6. Lens Maker\u2019s Formula<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><\/p>\n<p>Focal length depends on refractive index and radii.<br \/>\n<strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>Apply refraction formula at first surface.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296677\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162038.png\" alt=\"refraction formula at first surface.\" width=\"254\" height=\"74\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162038.png 254w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162038-150x44.png 150w\" sizes=\"auto, (max-width: 254px) 100vw, 254px\" \/><\/p>\n<ul>\n<li>Apply refraction at second surface.<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296678\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162310.png\" alt=\"refraction at second surface.\" width=\"259\" height=\"83\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162310.png 259w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162310-150x48.png 150w\" sizes=\"auto, (max-width: 259px) 100vw, 259px\" \/><\/li>\n<li>Combine both equations.<\/li>\n<li>Simplify under thin lens approximation.<\/li>\n<li>Write final formula.<\/li>\n<\/ul>\n<h3><strong>7. Einstein\u2019s Photoelectric Equation<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><\/p>\n<p>Energy conservation in photoelectric effect.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296679\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162825.png\" alt=\"Energy conservation in photoelectric effect.\" width=\"203\" height=\"50\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162825.png 203w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-162825-150x37.png 150w\" sizes=\"auto, (max-width: 203px) 100vw, 203px\" \/><\/p>\n<p><strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>State photon energy\u00a0<strong> E = h\u03bd.<\/strong><\/li>\n<li>Apply energy conservation principle.<br \/>\nWrite:<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296680\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163031.png\" alt=\"Einstein\u2019s photoelectric equation.\" width=\"267\" height=\"75\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163031.png 267w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163031-150x42.png 150w\" sizes=\"auto, (max-width: 267px) 100vw, 267px\" \/><\/p>\n<ul>\n<li>Rearrange for kinetic energy.<\/li>\n<\/ul>\n<h3><strong>8. Magnetic Field Due to Straight Conductor<\/strong><\/h3>\n<p><strong>What to Prove:<\/strong><br \/>\n<strong>B = \u03bc\u2080I \/ 2\u03c0r<\/strong><\/p>\n<p><strong>How to Prove:<\/strong><\/p>\n<ul>\n<li>Construct a circular Amperian path having a radius<strong> r.<\/strong><\/li>\n<li>Consider<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296681\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163700.png\" alt=\"Magnetic Field Due to Straight Conductor\" width=\"219\" height=\"97\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163700.png 219w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163700-150x66.png 150w\" sizes=\"auto, (max-width: 219px) 100vw, 219px\" \/><\/p>\n<p>Substituting into Ampere\u2019s law:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296682\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163850.png\" alt=\"Ampere\u2019s law\" width=\"192\" height=\"52\" srcset=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163850.png 192w, https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163850-150x41.png 150w\" sizes=\"auto, (max-width: 192px) 100vw, 192px\" \/><\/p>\n<ul>\n<li>we obtain:<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-296683\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-163956.png\" alt=\"Magnetic Field Due to Straight Conductor\" width=\"143\" height=\"77\" \/><\/p>\n<h3><strong>Read Also:<\/strong><\/h3>\n<p><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-class-12-physics-important-topics-and-tips-for-final-exams\/\">CBSE Class 12 Physics 2026: Important Topics And Preparation Tips<\/a><\/p>\n<h2><span style=\"font-weight: 400;\">Tips to Remember All Physics Formulas<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Use these steps:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Write <\/span><b>all Physics formulas<\/b><span style=\"font-weight: 400;\"> daily<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Revise before sleep<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Use flash cards<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Solve problems<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Keep a small <\/span><b>Physics formula sheet<\/b><span style=\"font-weight: 400;\"> with you.<\/span><\/p>\n<h2><b>Important Resources\u00a0for CBSE Board Class 12 Students<\/b><\/h2>\n<ul>\n<li><a title=\"CBSE Class 12 Board Exam Preparation Resources\" href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12\">CBSE Class 12 Board Exam Preparation Resources<\/a><\/li>\n<li><a title=\"CBSE Class 12 Date Sheet 2025-26\" href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12-date-sheet\">CBSE Class 12 Date Sheet 2025-26<\/a><\/li>\n<li><a title=\"CBSE Class 12 Syllabus 2025-26 PDF\" href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12-syllabus\">CBSE Class 12 Syllabus 2025-26 (All Subjects)<\/a><\/li>\n<li><a title=\"CBSE Class 12 Mock Test Papers with Answers\" href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12-mock-test-paper-solutions\">CBSE Class 12 Mock Test Papers with Answers<\/a><\/li>\n<li><a href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12th-previous-years-question-papers-solutions\">Practice Class 12 Previous Year Question Paper and Solutions<\/a><\/li>\n<\/ul>\n<h2><span style=\"font-weight: 400;\">How This Helps in Exams<\/span><\/h2>\n<p>A good formula sheet for Physics class 12 helps you:<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Save time<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Avoid mistakes<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\">Write correct answers<\/li>\n<\/ul>\n<p>It also boosts your confidence in the CBSE class 12 Physics paper.<\/p>\n<h2>CBSE Class 12 Exam Related Study Material<\/h2>\n<table border=\"1\" width=\"100%\" cellspacing=\"0\" cellpadding=\"8\">\n<tbody>\n<tr>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/score-90-percent-in-class-12-cbse-boards\/\" target=\"_blank\" rel=\"noopener\">How to Score 90% in Class 12 Board Exams<\/a><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-class-12-board-last-days-exam-guide\/\" target=\"_blank\" rel=\"noopener\">CBSE Class 12th Board Exam: Guide For Last Days Revision<\/a><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-exam-tips-smart-revision-plan-2026\/\" target=\"_blank\" rel=\"noopener\">CBSE Exam Tips: Smart Revision Plan to Maximize Preparation<\/a><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-class-12-exam-2026-subject-wise-important-topics\/\" target=\"_blank\" rel=\"noopener\">Class 12 Exam 2026: Subject-wise Important Topics<\/a><\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-class-12-boards-2026-toppers-secrets-tips-must-study-topics\/\" target=\"_blank\" rel=\"noopener\">CBSE Class 12 Boards 2026: Toppers\u2019 Secrets, Tips &amp; Must-Study Topics<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span style=\"font-weight: 400;\">Why Aakash Institute is the Best Choice<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">We at Aakash give you:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Full chapter notes<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>All derivations of Physics class 12<\/b><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Video lessons<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Live doubt support<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Test series<\/span><\/li>\n<\/ul>\n<p>We help you master every part of Physics class 12.<\/p>\n<h2><span style=\"font-weight: 400;\">Conclusion<\/span><\/h2>\n<p>Join Aakash today. Get a complete Physics formula sheet. Learn all Physics formulas and derivations. So, prepare smart and score high in the CBSE class 12 Physics paper.<\/p>\n<h2><span style=\"font-weight: 400;\">FAQs<\/span><\/h2>\n<ol>\n<li><b> Why is a formula sheet important for Physics?<\/b><\/li>\n<\/ol>\n<p>A Physics formula sheet helps you revise fast. It keeps all formulas in one place and saves time during revision and exam preparation.<\/p>\n<ol start=\"2\">\n<li><b> Which derivations are most important?<\/b><\/li>\n<\/ol>\n<p>The most important derivations in Physics class 12 include Coulomb\u2019s law, photoelectric equation, lens formula, and radioactive decay. These often carry high marks.<\/p>\n<ol start=\"3\">\n<li><b> Is NCERT enough for formulas?<\/b><\/li>\n<\/ol>\n<p>NCERT gives the base. But a formula sheet for Physics class 12 helps you revise all formulas quickly before the exam.<\/p>\n<ol start=\"4\">\n<li><b> How can I remember all formulas?<\/b><\/li>\n<\/ol>\n<p>Write all Physics formulas daily. Use short notes. Solve numericals. Revise before sleeping.<\/p>\n<ol start=\"5\">\n<li><b> How does Aakash institute help?<\/b><\/li>\n<\/ol>\n<p>Aakash institute gives clear notes, tests, and full Physics derivations class 12 support. This helps you prepare better and score more marks.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Physics is a scoring subject when you know the right formulas. You also need to understand where these formulas come from. This guide gives you a full formula sheet for Physics class 12. It also explains key ideas in simple words. Students often lose marks in the CBSE class 12 Physics paper because they forget [&hellip;]<\/p>\n","protected":false},"author":61,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3581,27310,4349],"tags":[27461,27460,27462],"class_list":["post-296582","post","type-post","status-publish","format-standard","hentry","category-cbse","category-cbse-class-12","category-physics","tag-cbse-class-12-physics-exam-2026","tag-physics-class-12-formula-sheet","tag-physics-derivations"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Physics Class 12 Formula Sheet with Derivations &amp; Key Concepts<\/title>\n<meta name=\"description\" content=\"Download a complete Physics formula sheet for Physics class 12 with key formulas &amp; derivations. 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Learn all Physics formulas, concepts, and exam tips for the CBSE class 12 Physics paper.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.aakash.ac.in\/blog\/physics-class-12-formula-sheet-with-derivations-and-key-concepts\/\" \/>\n<meta property=\"og:site_name\" content=\"Aakash Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/aakasheducation\" \/>\n<meta property=\"article:published_time\" content=\"2026-02-18T10:21:51+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-19T11:10:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/Screenshot-2026-02-19-141302.png\" \/>\n\t<meta property=\"og:image:width\" content=\"222\" \/>\n\t<meta property=\"og:image:height\" content=\"74\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Divya Solanki\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@AESL_Official\" \/>\n<meta name=\"twitter:site\" content=\"@AESL_Official\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Divya Solanki\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"9 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Physics Class 12 Formula Sheet with Derivations & Key Concepts","description":"Download a complete Physics formula sheet for Physics class 12 with key formulas & derivations. 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