Which of the following instruments consumes the highest current?
I. Electric iron
II. Television set
III. Torchlight
IV. Immersion heater
250v
220v
6v
110v
1kW
110W
30W
500W
Attached Figure / Diagram
A
I
B
II
C
III
D
IV
Verified Correct Answer: C.
Physical Principles & Numerical Solution
(I) I = \(\frac{P}{V} = \frac{1000}{25}\) = 4A
(II) I = \(\frac{110}{220}\) = 0.5A
(III) I = \(\frac{30}{6}\) = 5A
(IV) I = \(\frac{500}{110}\) = 4.55A
Source: Myschool Past Questions Archive (Record #56925)