Question

Question 16
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 1

(d) 5 A

Power, P= 1 KW = 1000 W
Voltage, V = 220V
P = V I
$\Rightarrow 1000=220\times I$
$\Rightarrow I=\frac{1000}{220}=4.54A\approx 5A$