State the principle of an AC generator. What determines the frequency of AC produced in a generator?

A DC motor is rotating in clockwise direction. How can the direction o...

State two ways by which the speed of rotation of an electric motor can...

(a) What is a natural magnet? (b) What is an artificial magnet?

(a) What is the nature of the magnetic field inside a solenoid? (b)...

(a) Which force is independent of the state of rest or of motion of a ...

(a) How does the magnetic field (B) due to a straight conductor vary w...

(a) Name a material of which permanent magnets are made? (b) Which o...

What are the two main systems of wiring commonly used in household cir...

Explain the significance of the following in a house circuiting. (i) k...

What is a switch and how is it connected?

What is the role of each of the three pins in a power plug?

State two serious hazards of electricity.

What the two main precautions to be taken while using an electric supp...

What is the role of magnetism in medical science?

(a) What type of energy changes into electrical energy in electromagne...

(a) Which polarity is developed on the face of the solenoid when a nor...

(a) Which is more dangerous: AC or DC? (b) Why so?

(a) Can we use AC for electroplating? (b) Can we operate an AC elect...

(a) On what factor does the current rating of a pole fuse depend? (b...