A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be________?
A60 m
B20 m
C40 m
D80 m
Correct answer
B. 20 m
Explanation
The correct answer is 20 m.
A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be________? - Answer and Explanation | Academy of Pakistan