Question

A negatively charged rubber rod was brought near some small pieces of paper. The rod’s charges repelled the

negative charges in the pieces. Which of the following caused the repulsion of the negative charges?
a. conduction b. insulation c. induction d. friction

____ 12. The diagram below shows two aluminum spheres.

Aluminum sphere A contains a small negative charge and is touched by aluminum sphere B, which has a
larger negative charge. Which of the following occurs next?
a. Protons flow from sphere B to sphere A.
b. Protons flow from sphere A to sphere B.
c. Electrons flow from sphere B to sphere A.
d. Electrons flow from sphere A to sphere B.

____ 13. Most electrical wires are covered with plastic or rubber. The wires are covered with plastic or rubber because

those materials
a. are conductors of electricity. c. are not conductors of electricity.
b. make complete electric circuits. d. make the electricity move quickly.

____ 14. The loss of static electricity as electric charges transfer from one object to another is called

a. friction. b. conduction. c. induction. d. static discharge.

Answer 1

c. Electrons flow from sphere B to sphere

___ 13. Most electrical wires are covered with plastic or rubber. The wires are covered with plastic or rubber because

those materials

a. are conductors of electricity. c. are not conductors of electricity.

b. make complete electric circuits. d. make the electricity move quickly.

____ 14. The loss of static electricity as electric charges transfer from one object to another is called

a. friction. b. conduction. c. induction. d. static discharge.