Question

A 25 W electric bulb is used
for 10 hours every day. How much electric-
ity does it consume each day?​

Answer 1

Answer:

The electricity consumed by the bulb per day is 250 watt-hour. Here, P is the power, E is the energy and t is time. Given P = 25 W, t = 10 hour. Thus, the electricity consumed by the bulb per day is 250 watt-hour.

Answer 2

Answer:

The electric bulb consumes 0.25 k W hr energy each day.

Explanation:

P = 25 W

So,

1000 W = 1 k W

=> P = 25 W

=> P = 25/1000 kW

=> P = 0.025 k W

Energy consumed = Power * Time

=> E = 0.025 * 10

=> Energy = 0.25 k W hr

The electric bulb consumes 0.25 k W hr energy each day.