Physics Static Electricity

A neutral aluminum pie tin is brought near and touched to a positively charged metal sphere

Both are positive

Two neutral metal cans - mounted on insulating stands - are touching. A positively-charged balloon is brought near Can A. The cans are then separated and the balloon is moved away.

Can A is negative and can B is positive

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

Can C is negative and can A is positive

A vinyl balloon is rubbed on a wool sweater. Vinyl has a greater affinity for electrons than wool.

The balloon is negative and the sweater is positive.

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

The can is negative and the balloon is positive

A positively charged acrylic plate is on the table. A neutral aluminum pie tin is held above it. The pie tin is then touched.

The plate is positive and the tin is negative

A negatively charged balloon is brought near a neutral conducting sphere. The sphere is then touched by a person and the balloon is moved away.

The sphere is positive and the balloon is negative