When connected to a mains of 250V, the fuse rating in the plug of an electric device of 1 KW is
The correct answer is: C
Explanation
1 KW = 1000 watts, power P = IV, thus for a mains of 250 V, the maximum permissible Current I = 1/V = 1000/250 = 4 AThus the fuse rating in the plug should be 4 A