Electrostatics and Charge Interactions

Mr. Anderson's video on the conservation of electric charge explains how charge is conserved within a system. Using simulations, he demonstrates how rubbing a balloon on a sweater transfers electrons, creating a negative charge. This charge can induce attraction or repulsion in conductors and insulators. The video also covers grounding, which allows charge to be transferred to the Earth, and uses examples like Amber and wool to illustrate charge transfer. Induction and conduction are explained with a pith ball and feather, and a simulation with an aluminum can shows how charges move in conductors.

What happens when a balloon is rubbed on a sweater in terms of charge?

• The balloon loses electrons and becomes positively charged.

• The balloon gains electrons and becomes negatively charged.

• The sweater loses electrons and becomes positively charged.

• The sweater gains electrons and becomes negatively charged.

How does grounding affect the charge in a system?

• It adds more positive charges to the system.

• It allows excess charges to flow to the Earth, changing the system's charge.

• It prevents any charge movement within the system.

• It removes all charges from the system.

In the amber and wool example, what is the net charge of the system before and after rubbing?

• The net charge is positive before and negative after.

• The net charge is negative before and positive after.

• The net charge is positive before and remains positive after.

• The net charge remains zero before and after.

What causes the feather to be attracted to the amber after rubbing it with wool?

• The feather becomes a conductor.

• The feather loses all its charges.

• The feather gains a positive charge on one side due to induction.

• The feather gains a negative charge.

Why does the pith ball repel from the amber after initial attraction?

• The pith ball becomes a neutral object.

• The pith ball loses all its charges.

• The pith ball becomes negatively charged, similar to the amber.

• The pith ball becomes positively charged.

What is the result of connecting a charged object to the Earth?

• The object loses its excess charge and becomes neutral.

• The object remains unchanged.

• The object gains more electrons.

• The object becomes positively charged.

How does a glass rod with a positive charge affect an aluminum can?

• It causes the can to become positively charged.

• It has no effect on the can.

• It attracts the can by inducing a negative charge on the can's side.

• It repels the can due to similar charges.

What happens when a rubber rod with a negative charge is brought near an aluminum can?

• The can remains neutral.

• The can becomes negatively charged.

• The can is attracted to the rod due to induced positive charge.

• The can is repelled by the rod.

What is the principle of charge conservation in a closed system?

• The total charge always increases over time.

• The total charge remains constant, only its distribution changes.

• Charges can only move out of the system.

• Charges can be created or destroyed.

What is the effect of induction on a neutral object when a charged object is nearby?

• The neutral object becomes a conductor.

• The neutral object gains a temporary charge on one side.

• The neutral object loses all its charges.

• The neutral object becomes permanently charged.