Arrange the current drawn by the following appliances, that operate in a house having a 220 V supply line, in ascending order
(A) 760 W electric iron
(B) 2 kW heater
(C) 80 W electric fan
(D) 100 W electric bulb
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (C), (D), (A), (B)
All the appliances work at the same voltage, so from \( P = VI \) the current is proportional to the power.
\( \displaystyle I = \frac{P}{V} \)
(C) 80 W electric fan — \( I = 80/220 \approx 0.36\,\mathrm{A} \)
(D) 100 W electric bulb — \( I = 100/220 \approx 0.45\,\mathrm{A} \)
(A) 760 W electric iron — \( I = 760/220 \approx 3.45\,\mathrm{A} \)
(B) 2 kW heater — \( I = 2000/220 \approx 9.09\,\mathrm{A} \)
Ascending order of current: (C), (D), (A), (B).
Shortcut: At a common voltage, arrange the appliances simply by power: 80 W < 100 W < 760 W < 2000 W.