Question

According to the definition of 1 kWh, a 100
watt bulb consumes one unit of electricity in
(a) 2 hours
(b) 5 hours
(C) 8 hours
(d) 10 hours​

Answer 1

Answer:

(d) 10 hours

Explanation:

1kWh = 3.6 × 10^6 J

So, energy = 3.6 × 10^6 J

Power = 100 W

Power = Energy ÷ Time

Time = Energy ÷ Power = 3.6 × 10^6 J ÷ 100 W = 3.6 × 10^4 seconds = 3600 × 10 seconds = 1 h × 10 = 10 h