Lakhmir Singh and Manjit Kaur Solutions for Chapter: Electricity, Exercise 39: Multiple Choice Questions (MCQs)

The current passing through an electric kettle has been doubled. The heat produced will become:

An electric fuse works on the principle of:

The elements of electrical heating devices are usually made of:

The heat produced in a wire of resistance $\text{'}x\text{'}$ when a current $\text{'}y\text{'}$ flows through it in time $\text{'}z\text{'}$ is given by

Which of the following characteristics is not suitable for a fuse wire?

In a filament type light bulb, most of the electric power consumed appears as:

Which of the following is the most likely temperature of the filament of an electric light bulb when it is working on the normal $220 \mathrm{V}$ supply line ?

If the current flowing through a fixed resistor is halved, the heat produced in it will become: