The Nature of Electricity: Charging Objects

The video tutorial explains three methods of charging objects: friction, conduction, and induction. Friction involves rubbing objects together to transfer electrons, as demonstrated with a plastic rod and woolen cloth. Conduction requires direct contact, shown with a copper wire and battery. Induction charges objects without contact, illustrated by a comb and paper. Each method highlights different principles of electric charge transfer.

What happens to a plastic rod when it is rubbed with a woolen cloth?

• It becomes negatively charged.

• It loses electrons.

• It remains neutral.

• It becomes positively charged.

Which method of charging involves direct contact between objects?

• Radiation

• Induction

• Friction

• Conduction

What is a characteristic of conductors?

• They are made of plastic.

• They allow electricity to flow easily.

• They are always negatively charged.

• They do not allow electricity to flow.

How does induction differ from other charging methods?

• It only works with metal objects.

• It charges objects without touching them.

• It involves direct contact between objects.

• It requires rubbing two objects together.

What causes the movement of neutral paper when a charged comb is brought near?

• The comb loses its charge.

• The paper becomes positively charged.

• The electric charge in the paper rearranges.

• The paper gains electrons from the comb.