Electrostatic Force

Q.

What is an electrostatic force? Give two examples where you find this force in nature? [3 MARKS]

Q.

When a plastic pen is rubbed in dry hair, it attracts tiny pieces of paper. Which force is involved in this process?

Q. The static electricity can be produced by rubbing. This method is also called charging by_______.

1. Nuclear force
2. Weak force
3. Friction
4. Gravity

Q. The force exerted by a charged body on any other charged body is known as _____ force.

1. magnetic
2. electrostatic
3. gravitational
4. pressure

Q.

What is an electrostatic force?

1. Force exerted by a charged body on a charged body only.

2. Force exerted by a charged body on an uncharged body only.

3. Force exerted by a charged body on both charged body and uncharged body.

4. Force which is static.

Q.

Which force is responsible for raising our body hair when we try to take off a terylene or polyester shirt in the dry weather?

Q. Electrostatic force is always attractive in nature.

1. True
2. False

Q. If a charged plastic straw is brought near another uncharged straw . What will happen??

Q.

Charges are of two types: negative and positive. Like charges repel while unlike charges attract each other.

1. Pressure

2. Pascal

Q.

Which of the following force is utilised in reducing air pollution by removing dust, soot and fly-ash particles from the smoke coming out of chimneys of factories ?
(a) magnetic force (b) gravitational force (c) electostatic force (d) frictional force

Q.

Which force acts from a distance and pulls an object of iron?

Q.

Can we classify the force exerted by a charged body on another uncharged body as electrostatic force? Please explain

Q. Electrostatic forces act between:

1. Uncharged particles
2. Charged particles
3. Particles with mass
4. Bodies in contact

Q.

What is an electrostatic force? Give two examples where you find this force in nature? [3 MARKS]

Q. A positively charged plastic rod is brought near a neutral aluminium rod. Which of the following statements is/are correct?​
Statement I: The rods will attract each other.
Statement II: The aluminium rod will become negatively charged.​

Q. Why can't ebonite be charged by touching it with a charged copper rod ?

Q. What do we call the force exerted between two charged particles at rest?

1. Magnetic force
2. Gravitational force
3. Electrostatic force
4. Frictional force

Q.

Which is the strongest force among the four fundamental forces?

1. Gravitational force

2. Electromagnetic force
3. Strong nuclear force
4. Weak nuclear force

Q. ntProve that the equilibrium of a charged particle under the action of electrostatic force alone can never be stable.n

Q. Which of following forces is responsible for sticking of synthetic fibre clothes to our skin in dry weather?

1. Muscular force
2. Gravitational force
3. Electrostatic force
4. Frictional force

Q.

Question 21
Two thermocol balls held close to each other move away from each other, when they are released. Name the force which might be responsible for this phenomenon. Explain.

Q.

What is the force which acts between charged particles at rest known as?

1. Weak nuclear force

2. Strong nuclear force

3. Electrostatic force
4. None of these

Q. An ebonite rod is rubbed with fur. The charge on the ebonite rod is ______ and the charge on the fur is _______.

1. Negative, Positive
2. Negative, Negative
3. Positive, Negative
4. Positive, Positive

Q.

An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth .It was found that the balloon sticks to the wall.What force might be responsible for the attraction between the balloon and the wall ?

Q.

Question 13

During dry weather, clothes made of synthetic fibre often stick to the skin. Which type of force is responsible for this phenomenon?

Q. The force exerted by a charged body on another charged or uncharged body is known as _______.

1. frictional force
2. muscular force
3. magnetic force
4. electrostatic force

Q. What kind of charge is produced in a silk cloth when it is rubbed against a glass rod?

Q. Below are the examples of different types of forces. How many of them are the example of gravitational force?

• Raindrops falling on the Earth.
• Running a comb through your dry hair.
• A bar magnet suspended freely.
• Bullocks ploughing the field.

1. 1
2. 4
3. 2
4. 3

Q.

When we kick, throw or hit a ball, we are applying a ________ on it.

Q. Assertion: A magnet can influence another magnet to move, without the physical contact between the two magnets.
Reason: Magnetic force is a non-contact force.

1. Both assertion and reason are true and the reason is not the correct explanation of the assertion.
2. Both assertion and reason are true and the reason is the correct explanation of the assertion.
3. Assertion is a true statement but the reason is false.
4. Both assertion and reason are false statements.