Introduction to Electricity

Q.

Which machine is used to generate electricity from steam?

1. Electric heater
2. Transformer
3. Electric motor
4. Electric generator

Q.

The experimental evidence of electrical nature of matter was show by _____________

Q.

Path along which the electric current flows in an electric circuit is called

1. switch

2. electric cell

3. electric circuit

4. electric wire

Q. Which of the following can use an electric cell for their operation?

1. All of these

2. Operating a remote control

3. Operating a walkie-talkie

4. Lighting a torch

Q.

Who discovered electricity?

Q. Which of the following precautions need to be taken while using electric appliances ?

1. We should never experiment with electric supply through mains, generator
2. We should never touch a ligtened bulb connected to the mains
3. We should never used metal piece or wire in place of fuse
4. We should never turn the switch in ON position

Q. Which of the following energy conversions take place in a torch?

1. $\text{Electrical}\to \text{Chemical}\to \text{Light}$
2. $\text{Chemical}\to \text{Electrical}\to \text{Light}$
3. $\text{Electrical}\to \text{Light}\to \text{Chemical}$
4. $\text{Light}\to \text{Chemical}\to \text{Electrical}$

Q. If a person happens to touch a live wire, he gets a severe______

1. shock
2. Jerk
3. Pain
4. None of above

Q. A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify Y and Z.

Q.

Electricity is not a form of energy.

1. True

2. False

Q. Name two sources of electricity.

Q.

7) State two most important uses of following non -metal

(e) Graphite

Q. For which unit do we pay our electricity bill ?

Q.

An ________________ is the path through which the electric current passes.

1. electric loop

2. electric circuit

3. electric fabric

4. electric insulator

Q. The existence of static electricity was first discovered by _______.

1. William Gilbert
2. Thales
3. Galvani
4. Thomas Alva Edison

Q. The filament of a bulb is made up of

1. chromium
2. aluminium
3. tungsten
4. platinum