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) 4 A
(d) 5 A
Answer:
The rating of fuse wire must be slightly greater than the current flowing through the device.
Given,
- Power, P = 1 kW = 1000 W
- Voltage , V = 220 V
We know that,
Current, I = P / V
Therefore,
I = 1000 / 220 = 4.5 A
So, rating fuse wire = 5 A
So, the correct answer is (d).
