Question

An electric kettle is rated 3kW, 250V. Give reason whether this kettle can be used in a circuit which contains 13Afuse.

Answer 1

The information provided in the question is as follows:

Power of kettle, P	3 kW = 3000 Watt
Voltage, V	250 V
Rating of fuse	13 A

The power of the kettle is given as:
$$\begin{gathered} P=VI \\ I=\frac{P}{V}=\frac{3000}{250}=12A \end{gathered}$$
As the current drawn by the kettle is less than the rating of the fuse therefore, this kettle can be used in a circuit which contains 13 A fuse.