Electrical Circuits

If the electric circuit is CLOSED, the switch is _______. 

• ON
• OFF

If the electric circuit is OPEN, the switch is ____.

• ON
• OFF

A conductor is?

• material that current can pass through easily
• material that current cannot pass through easily
• magnet
• electric current

Insulator is?

• material that current can pass through easily
• material that current cannot pass through easily
• magnet
• static electricity

Would would best complete this circuit?

• A wire
• A switch
• A battery
• A light bulb

Mrs. Moore made a circuit. It did not light up. Why?

• It needs to be closed to work

• It needs an insulator in the open spot

• It needs a switch to work

When the wires of this circuit are touched to this coin, the light bulb is lit. Why does this happen?

• the coin is an insulator of electricity

• the battery gives the energy to the coin

• the coin is a conductor of electricity

• the light bulb is a conductor of electricity

What is the power source in this circuit?

• Lightbulb
• Switch
• Wires
• Battery

A class prepared some electrical circuits using battery, connecting wires, and three light bulbs.  Which of these circuits can make the three bulbs light?

• A
• B
• C
• D

Brayson made the circuit shown here in his science class. What is the most likely reason that the bulb is not lit?

• The bulb is cracked.

• He did not use the right size battery.

• He used too many pieces of wire.

• He left the switch open.