Rajesh Singh, Indu Gupta and, Sikha Sharma Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 1: Multiple Choice Questions (MCQs)

A uniform magnetic field exists in the plane of paper pointing from left to right as shown in figure. In the field an electron and a proton move as shown. The electron and the proton experience.

Commercial electric motors do not use

In the arrangement shown in figure, there are two coils wound on a non-conducting cylindrical rod. Initially, the key is not inserted. Then the key is inserted and later removed. Then

Choose the incorrect statement.

A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in figure. The direction of magnetic field at a point will be north to south.

The strength of magnetic field inside a long current carrying straight solenoid is

To convert an $\mathrm{AC}$ generator into $\mathrm{DC}$ generator,

The most important safety method used for protecting home appliances from short circuiting or overloading is