Electrostatic force

Q. Why do we say that repulsion is a sure test of magnetism.

Q.

Choose the correct option:

Statement 1: When a plastic straw is rubbed with a piece of paper and brought near another plastic straw, it attracts the second straw.

Statement 2: A straw is said to have acquired electrostatic charge after it has been rubbed with a piece of paper. Therefore, it exerts an electrostatic force on the second straw and attracts it.

1. Statement 1 is correct and statement 2 is correct explanation of it.

2. Statement 1 is correct but statement 2 is wrong explanation of it.

3. Statement 1 is wrong and statement 2 is wrong explanation of it.

4. Statement 1 is wrong and statement 2 is correct explanation of it.

Q. The given figure shows that paper bits are attracted towards the plastic comb. Which of the following types of force shows this activity?

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

Q.

Is electrostatic force strong or weak?

Q.

Which of the following statements are correct about magnetic and electrostatic forces?

1. They are contact forces.

2. Like charges/poles repel each other.

3. Unlike charges/poles attract each other.

4. They are non-contact forces.

Q.

What are electrostatic forces?

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

2. Force which is static.

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

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

Q. Two charged particles A and B are kept fixed at a separation of 2 m as shown below.
Which of the following forces acts between them?

1. electrostatic force

2. magnetic force

3. frictional force

4. muscular force

Q.

Electrostatic forces are:

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.

Electrostatic forces are contact forces.

1. 1, 3 and 4

2. 1 and 3

Q.

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

1. Pressure

2. Pascal

Q.

Like charges repel each other.

1. Pressure

2. Pascal