How many hours must a 200 W bulb glow to con-sume 1 unit electrical energy.

How many hours should a 200 W bulb glow to consume 2 units of electrical energy?

For how many hours can a 100 W bulb be sued to have one unit of electrical energy consumption ?

For how many hours can a 100 W bulb be sued to have one unit of electrical energy consumption ?

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 .