Question

Assertion: The power of a source is measured as the amount of work done per second by the source, or energy change per second.

Reason: When a body does work, its energy decreases.

Options

• If both Assertion and Reason are true and the Reason is correct explanation of the Assertion.

• If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

• If Assertion is true, but the Reason is false.

• If Assertion is false, but the Reason is true.

Answer 1

If both Assertion and Reason are true, but Reason is not correct explanation of the Assertion.

Explanation:

Power is the rate of doing work or the rate of change of energy. Therefore, the Assertion (A) is true.

When a body does work, its energy decreases by the amount of work done. Therefore, the Reason (R) is also true.

However, the Reason does not directly explain why power is defined as work done or energy changed per second.

Hence, both A and R are true, but R is not the correct explanation of A.