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Physics

Assertion (A) : The power spent in doing a work remains the same, even if the same work is done in a lesser time.

Reason (R) : The power spent by a source depends on the time taken by the source to do that work.

  1. Both A and R are true and R is the correct explanation of A
  2. Both A and R are true and R is not the correct explanation of A
  3. Assertion is true but reason is false
  4. Assertion is false but reason is true

Work, Energy & Power

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Answer

Assertion is false but reason is true

Explanation

Assertion (A) is false because the power spent in doing a work depends inversely on time taken to do it so for a given amount of work performed at a faster rate i.e., in lesser time implies more power is spent.

Reason (R) is true because power depends inversely on the time taken to do a work so less time means more power spent, and vice versa.

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