Question

1 kW 220 V electric heater is to be used with 220 V D C supply :

What is the current in the heater:

• A. 1 A
• B. 4.5 A
• C. 6 A
• D. 10 A
• E. None of these

Answer 1

The correct option is B 4.5 A

A. Current in the heater $P=VI$

$\Rightarrow I=\frac{P}{V}=\frac{1000}{220}=4.54A$