Question

Electric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find he energy consumed and the

current drawn.

Answer 1

Power, P = 2.2 kW = 2200 W

Voltage, V = 220 V

Time, t = 3 h = 3 × 3600 = 10800 s

So, the energy consumed is = 2200 × 10800 = 23760000 J

The current drawn is, I = P/V = 2200/220 = 10 A

Answer 2

Answer:

Energy = 23760000 J

Current= 10 A

Explanation:

Power is defined as rate of doing work

Energy is defined as the capacity to do a work.

Now in the given question ,

Power given=2.2 kW = 2200 W

Voltage= 220 V

Time = 3 hours=3 × 3600 = 10800 s

We know the formula for energy is E=Pt where E is the energy P is the power and t is the time taken , so therefore

The energy consumed is = 2200 × 10800 = 23760000 J

The current drawn is, I = P/V = 2200/220 = 10 A