Electricity PHYSICS - Electricity

Yashika was given an electroscope with its gold leaves diverged. What do the diverged leaves indicate? She was also given a rod which she did not know was charged or not. Yashika touched the rod to the cap of the electroscope to find that the divergence of the gold leaves decreased. What should she infer about the charge status of the rod?

Why does current flow through the earth wire?

Why is a gold leaf electroscope enclosed in a glass case?

What would happen if electrical appliances are not connected to the earth wire ?

Why does a fuse wire has lower melting point than that of connecting wires ?

List two precautions while handling electricity.

What is meant by overloading of an electric circuit?

How is a short circuit caused ?

What is meant by earthing of an electrical device?

Define charging by conduction.

Explain three electrical hazards.

Describe the role of switches and electric meters in houses.

Describe the working of an electric fuse.

What is lightning? How is it caused?

State the basic property of electric charges. Describe an experiment to prove this property.

Describe the structure of an atom with the help of a diagram.

Miniature circuit breakers act as safety devices.

Electric meters measure the consumption of energy in joules.

The cables that bring electricity to our homes consist of five wires.

Lightning is caused due to discharge between similarly charged clouds.