Chap 17. Static Electricity

What is the unit of charge?

• Ampere

• Coulomb

• Volt

• Second

A student tests the electrical conduction of four materials.

aluminium

iron

plastic

silver

Which materials conduct electricity?

• aluminium, iron and silver only

• aluminium and silver only

• iron, silver and plastic only

• plastic only

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

A plastic rod is rubbed with a dry cloth. The rod becomes positively charged.

Why has the rod become positively charged?

• It has gained electrons.

• It has gained neutrons.

• It has lost electrons.

• It has lost neutrons.

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D