Question

An electric kettle consumes 1 kW of electric
power when operated at 220 V. A fuse wire of
what rating must be used for it?
(1) 1 A (2) 2 A (3) 4 A (4) 5 A

Answer 1

we know that

V =IR

220=I×1000 w

220/1000=I

I=1000/220

I=5

there fore

rating must be5 A

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Answer 2

Answer:

given:-p = 1 K W which is=1000W

V=220V

Now P=VI

therefore I = P/V

I=1000/220= 4.5A

therefore the rating must be either 4.5A or 5A.

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