Electricity and circuits

If a current is drawn from the cell, the circuit is said to be:

• Open

• Closed

• Disconnected

• Shorted

A device that is used to break an electric circuit is called _________.

Electric current can flow through metal.

• True

• False

Which material is a good conductor of electricity?

• Wood

• Copper

• Plastic

Which of these is a set of only conductors of electric current?

• Wood, graphite, copper

• Copper, graphite, silver

• Graphite, plastic, glass

• Pure water, silver, copper

Illustrate an open electric circuit using circuit symbols.

What is an electric circuit?

Iron is a ______ conductor of electricity

Which of the following materials is a good conductor of electricity?

• Plastic

• Copper

• Wood

Is it true that electric current can flow through glass?

• True

• False