Electrostatic Forces in Action With Balloons and Everyday Objects

The video tutorial demonstrates the concept of electrostatic force using balloons. Initially, two balloons show no interaction. After rubbing one balloon with a woolen cloth, it becomes charged and attracts the uncharged balloon. When both balloons are charged, they repel each other. This illustrates that electrostatic force can be attractive or repulsive. The video concludes with a home experiment using a comb and paper to further explain electrostatic force as a non-contact force.

What was the initial observation when the free balloon was brought near the suspended balloon?

• They repelled each other.

• They attracted each other.

• They burst.

• There was no noticeable force.

What happens to the free balloon after rubbing it with a woollen cloth?

• It acquires an electrostatic charge.

• It becomes heavier.

• It changes color.

• It deflates.

What happens to a balloon when it is rubbed with a woollen cloth?

• It becomes charged.

• It loses its elasticity.

• It changes shape.

• It becomes uncharged.

Why do the two balloons repel each other after both are charged?

• Because they are made of different materials.

• Because they have the same type of charge.

• Because they are tied with threads.

• Because they are of different sizes.

What is the nature of the force between a charged and an uncharged body?

• Neutral

• Repulsive

• Attractive

• Magnetic

Is electrostatic force a contact or non-contact force?

• Contact force

• Non-contact force

• Neither

• Both contact and non-contact

What can be concluded about the nature of electrostatic force from the experiments?

• It can be either attractive or repulsive.

• It has no effect.

• It is always attractive.

• It is always repulsive.

What is the effect of rubbing two bodies together?

• They acquire charge.

• They become transparent.

• They lose mass.

• They change temperature.

What happens when you rub a comb with your hair and bring it near small pieces of paper?

• The comb repels the paper pieces.

• The paper pieces stick to each other.

• The paper pieces get attracted to the comb.

• The comb changes color.

What is responsible for the attraction between the comb and paper pieces?

• Frictional force

• Gravitational force

• Magnetic force

• Electrostatic charge