Question

Assertion (A): Kilowatt hour is the commercial unit of electric energy.

Reason (R): When 1000 W of power is used it is called one kilowatt.

Options

• Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• Assertion (A) is false, but Reason (R) is true.

• Assertion (A) is true, but Reason (R) is false.

Answer 1

Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

Explanation:

Kilowatt-hour is the commercial unit of electrical energy. The reason correctly states that 1000 W is one kilowatt, but this fact alone does not explain why kilowatt-hour is a unit of energy.