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

Here, power = P = 1 KW = 1000 W

Voltage = V = 220 V

Current = I = ?

Now, I = P/V = 1000/220 = 4.5 A

Now, rating of fuse wire must be slightly greater than 4.5 A i.e., 5 A.

The correct option is D.