Exploring Electric Charge Through a Comb and Paper Experiment

The video explains how a plastic comb can attract paper due to static electricity. Initially, the comb is electrically neutral, but rubbing it on dry hair transfers charge, allowing it to attract paper. This phenomenon is due to static electricity. The video contrasts this with a metal comb, which does not attract paper because metal is a good conductor, allowing charges to flow to the earth, preventing charge buildup.

What was the initial reaction when the plastic comb was brought close to the pieces of paper?

• The pieces of paper moved away.

• Nothing happened.

• The pieces of paper were attracted.

• The pieces of paper were repelled.

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What is electric charge?

• The force exerted by an object.

• The quantity of electricity held in an object.

• The ability to conduct electricity.

• The movement of electrons.

What are the two types of electric charges?

• Positive and negative

• Static and dynamic

• Negative and neutral

• Positive and neutral

What does it mean when an object is electrically neutral?

• It has no charges at all.

• It has equal positive and negative charges.

• It has more negative charges than positive charges.

• It has more positive charges than negative charges.

Why was the plastic comb initially unable to attract the pieces of paper?

• It was already charged.

• It was electrically neutral.

• It was too far from the paper.

• It was wet.

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What happens to the plastic comb when it is rubbed on dry hair?

• It loses its electric charge.

• It becomes electrically neutral.

• It gains an electric charge.

• It becomes wet.

What is the term for the charge that the plastic comb gains after being rubbed on dry hair?

• Current electricity

• Static electricity

• Neutral electricity

• Dynamic electricity

Why does a metallic comb not attract pieces of paper like a plastic comb?

• Because metal is more expensive.

• Because metal is a poor conductor of electricity.

• Because metal is heavier than plastic.

• Because metal is a good conductor of electricity.

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What happens to the electric charges in a metallic comb?

• They build up in the comb.

• They flow through the comb onto the earth.

• They stay neutral.

• They repel each other.

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What is the main reason a plastic comb can attract pieces of paper after being rubbed on dry hair?

• It becomes wet.

• It gains static electricity.

• It becomes heavier.

• It loses its charges.

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