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Heating Effect of Current

An electric k...

Question

An electric kettle rated at 220 V, 2.2 kW, works for 3 hours. Find the energy consumed and the current

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Solution

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

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