Electrostatics

Q.

Question 26

Explain why it is safer to use a wireless telephone instead of a landline telephone during lightning.

Q. Why should we not use landline phones during a lightning strike?

Q. When charges are moving, we call it as but electrostatics deals with charges which are.

1. electric current
2. electric noise
3. stationary
4. fast moving

Q.

When can an electric charge give rise to a magnetic field?

Q.

Mark the direction of conventional current flow and electrical charge flow in the given picture.

Q.

The force experienced by a unit point in an electric field is callled:

1. electeric energy

2. electric potential

3. electric intensity

4. potential difference

Q. Spark can be closely related to .

1. earthquake
2. lighting
3. cyclone

Q. The process of transferring the charge from a charged body to the Earth is known as

1. Earthing
2. Electrocution
3. Hydrolysis
4. Electrolysis

Q. Describe with the help of a diagram an instrument which can be used to detect a charged body.
[5 marks]
[NCERT, APSCERT]
[Electroscope]

Q. A spark can be generated by rubbing wool against amber.

1. True
2. False

Q. What is the name of the device shown in the figure?

1. Coal electroscope
2. Pith ball electroscope
3. Gold leaf electroscope
4. Needle electroscope

Q. Maya uses a plastic brush on dry hair. Her hair gets attracted to the comb everytime it is near. This is due to static electricity.

1. True
2. False

Q. The electrostatic force between two subatomic particles is than/as the gravitational force between them.

1. stronger
2. weaker
3. equally strong