Analyze each situation and determine the type of charge possessed by the objects as a result of the charging process. Identify the type of charge and give a brief explanation of your answer based on your understanding of charging by friction, conduction and induction.

1. A glass plate is rubbed with a cotton cloth. Cotton has a greater affinity for electrons than glass.

. Question 1: Once rubbed, what is the charge on the glass plate?

(positive, negative, neutral) Explain.

. What is the charge on the cloth? (positive, negative, neutral)

Explain.

2. A neutral aluminum tin is brought near and touched to a negatively-charged metal sphere.

. Question 1: After touching, what is the charge on the tin? (positive, negative, neutral) Explain.

. What is the charge on the metal sphere? (positive, negative, neutral) (positive, negative, neutral) Explain.

3. A negatively-charged balloon is brought near a neutral, conducting sphere (mounted on an insulating stand). The sphere is touched by a person and the balloon is moved away.

. Question 1: What is the charge on the balloon after? (positive, negative, neutral) Explain.

. What is the charge on the metal sphere? (positive, negative, neutral) (positive, negative, neutral) Explain.

4. A neutral metal can is mounted on a foam stand. A positively charged balloon is brought nearby. The can is touched on the opposite side.

. Question 1: What is the charge on the balloon after? (positive, negative, neutral) Explain.

. Question 2: What is the charge on the

can? (positive, negative, neutral) Explain.

5. Three neutral, metal cans - mounted on insulating stands - are touching. A negatively-charged balloon is brought near Can C. Can B is then removed.

. Question 1: What is the charge on Can A? (positive, negative, neutral) Explain.

. Question 2: What is the charge on Can C? (positive, negative, neutral) Explain.