Question 28
Tick (✓) the three sentences that are correct.
A. Electric charges cannot move freely in an insulator.
B. The electrons that can move in a conductor are called moving electrons.
C. For safety, electrical wires should always be covered with an insulator.
D. Brass is a good material for the pins of a plug.
A. Electric charges cannot move freely in an insulator.
B. The electrons that can move in a conductor are called moving electrons.
C. For safety, electrical wires should always be covered with an insulator.
D. Brass is a good material for the pins of a plug.
