Assertion (A): A 200 W bulb consumes 2 units of electrical energy when it is used for 10 hours.
Reason (R): 1 unit of electrical energy = 1000 k Wh .

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.

Answer

C

Explanation

We know P= Q/t
`implies Q = P xx t `
Q = 200 W `xx` 10 h
= 2000 Wh
= 2 kWh `( :. 1 unit = 1 kWh)`
= 2 electrical units
Hence, A is correct but R is not correct.