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?
(a) 1 A (b) 2 A
(c) 5 A (d) 4 A
Solution
(c) 5 A
Given that,
power = P = 1 kW = 1000 W
Voltage = V = 220
Now, I = P/V = 1000/220 = 4.5 A
Now rating of fuse wire must be slightly greater than 4.5 A, that is, 5 A.
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