JAMB - Physics (2020 - No. 35)
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 |
I
II
III
IV
설명
(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