5 Differences Between Power and Energy | CBSE Class 11 Physics Notes

5 Differences Between Power and Energy: CBSE Class 11 Physics Notes

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Energy is the capacity to do work.

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Power is the rate at which work is done, or energy is supplied.

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The S.I. unit of energy is Joule.

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The S.I. unit of power is the watt.

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The other high commercial unit of energy is kilowatt-hour.

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Power is expressed in kilowatt and horsepower. 1 horsepower = 746 watt

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The amount of energy consumed can be calculated by W = F x s; if a force F is applied to an object, its displacement is s. Note that the work done on an object is stored as energy in the object.

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Power can be calculated by P = w/t, where W is the work done for time t.

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There are various forms of energy such as electrical energy, sound energy, light energy, etc.

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The various types of power are electrical power, optical power, human power, etc.

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