Question

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

The correct option is D 5 A

Given,

Power, P= 1 KW = 1000 W
Voltage, V = 220 V

We know,

Power, P = V I

Putting all the values
$\Rightarrow 1000=220\times I$
$\Rightarrow I=\frac{1000}{220}=4.54A\approx 5A$
Therefore, fuse wire of rating 5 A can be used.