Neha Jindal Solutions for Chapter: Magnetic Effects of Electric Current, Exercise 2: Progress Check 2

What is the function of brushes in an electric motor?

How does the use of electromagnet instead of permanent magnet improve its power?

Frequency of AC supplied in India is $50 \mathrm{Hz}$. After how many seconds does AC change its direction?

Give an important use of AC generator.

Give two methods of inducing electric current in a coil.

Consider a circular loop of wire lying in the plane of the table. Let the current pass through the loop clockwise. Apply the right-hand rule to find out the direction of the magnetic field inside and outside the loop.

Give two examples of devices which are connected to $5 \mathrm{A}$ current rating circuit.

Give two examples of devices which are connected to $15 \mathrm{A}$ current rating circuit.