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NCERT Solutions for Class 7 Science Chapter 14: Electric Current and its Effects

iacst-2022

In this chapter, the reader gets to know further about the concepts of electricity and circuits. Class 6 had introduced the topic, whereas, in class 7, the concept is dealt with in great detail. Readers are advised to understand this chapter properly for a firm foundation of this chapter. Electricity and Circuits are further discussed in detail in the higher classes. The following are the points discussed in the chapter:

  • An electric circuit can be represented by a circuit diagram.
  • When an electric current flows through a wire, the wire gets heated. It is the heating effect of current.
  • The ISI mark on the appliances ensures that the appliance is safe and wastage of energy is to a minimum.
  • The heating effect of current has many applications. When an electric current flows through a wire, it behaves like a magnet.
  • A current-carrying coil of an insulated wire wrapped around a piece of iron is called an electromagnet. Electromagnets are used in many devices such as the electric bell, toys, refrigerator, etc.
  • Wires made from some special materials melt quickly and break when large electric currents are passed through them.

 

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Also See
Chapter 1 Nutrition in Plants Chapter 2 Nutrition in Animals Chapter 3 Fiber to Fabric
Chapter 4 Heat Chapter 5 Acids, Bases and Salts Chapter 6 Physical and Chemical Changes
Chapter 7 Weather, Climate and Adaptations of Animals to Climate Chapter 8 Winds, Storms and Cyclones Chapter 9 Soil
Chapter 10 Respiration in Organisms Chapter 11 Transportation in Animals and Plants Chapter 12 Reproduction in Plants
Chapter 13 Motion and Time Chapter 15 Light Chapter 16 Water: A Precious Resource
Chapter 17 Forests: Our Lifeline Chapter 18 Wastewater Story

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