Question

A 1.25 kW heater works on a 220 V mains supply. What current rating would a suitable fuse have ?; A. 2 A; B. 5 A; C. 10 A; D. 13 A

Answer 1

Answer:

(C) 10 A

Explanation:

As per the question,

Given data:

Voltage supply = 220 V

Power consumed = 1.25 kW

Formula used:

Power = Voltage × Current

Now,

Put the given values in the formula, we get

Power = Voltage × Current

⇒ 1250 = 220 × I

⇒ I = 5.7 A

Therefore, current rating for a suitable fuse must be greater than 5.7 A and from the given option the value just greater than 5.7 A is 10 A.

Hence, option (C)  is the correct .