Question

An electric kettle consumes 1 kilowatt of electric power when operated at 220 volt .A fuse wire of ______rating must be used for it. *
1 point

Answer 1

Answer:

Correct option is 5A

If a certain amount of power is dissipated for a given time, then energy is dissipated.

Energy (Power×time) is measured in Joules and by including time (t) in the power formulae, the energy dissipated by a component or circuit can be calculated.

Energy dissipated = PtorVI×torV

2

RtorevenI

2

RtJoules.

We will exclude the time factor in this case. The power is 1 KW, that is, 1000 W and the voltage. The above formula is rewritten as I=P/V.

Therefore, the current required for the kettle I=1000/220 = 4.5 A.

Hence, to tolerate a current of 4.5 A, minimum of 5 A fuse should be used

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Answer 2

Answer:

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Explanation:

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