# 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 ?

42 views
in Physics
closed
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

by (71.7k points)
selected by

Given, power, P = 1 kW = 1000 W

Voltage, V = 220 V
Current, I = ?
I = (P)/(V) = (1000)/(220) = 4.5A
Thus, the rating of fuse-wire is 5 A which is greater than 4.5 A.