Question

An electrical appliance is rated as 90 W - 225 V. How much current will flow through the appliance when in use?

• A. 0.5 A
• B. 0.4 A
• C. 0.6 A
• D. 0.7 A

Answer 1

The correct option is B

0.4 A

90 W - 225 V power rating of appliance means, If an appliance is put it on a 225 V circuit, it will consume 90 W of electrical energy i.e., electrical energy consumed by it in 1 sec is 90 J.

We know that,

I = $\frac{P}{V}$

V = 225 V

P = 90 W

I = $\frac{90}{225}$

I = 0.4 A