Current Electricity

An example of a conductor is :

• a glass paperweight

• a plastic cap

• a metal screw

• a wooden handle

In a series circuit with 4 bulbs:

• a switch is never used

• all of the bulbs become dimmer if another bulb is added

• There are many paths for electricity to take

• the remaining 3 bulbs stay lit if one burns out

In a simple series circuit, why does the bulb light when you close the switch?

• A. Because the switch produces electricity

• B. Because closing the switch completes the circuit

• C. Because closing the switch breaks the circuit

An example of an insulator is:

• iron

• silver

• copper wire

• rubber

All wires used in electric circuits should be covered with:

• a colored material.
• a conducting material.
• an insulating material.
• none of these.

What is the difference between a conductor and an insulator?

• An insulator allows electricity to flow through it easily and a conductor does not

• A conductor allows electricity to flow through it easily and an insulator does not.

• An insulator is magnetic and a conductor is not

• A conductor is magnetic and an insulator is not

What happens to the brightness of the light bulbs in a series circuit when you add more lights.

• Each bulb gets dimmer

• Each bulb remains the same

• Half of the bulbs get dimmer

• Each bulb gets brighter

Does this diagram represent a series or parallel circuit?

• series circuit

• parallel circuit

What material will make a good insulator of electricity?

• A. Copper wire

• B. Aluminum foil

• C. Gold wire

• D. Plastic

What part of a circuit is this object?

• energy source

• energy receiver

• electrical conductor

• switch