Circuits/Electricity Test

What is a conductor?

•  A material that allows electricity to flow through it.  The circuit is complete. 
• A material that does not allow electricity to flow through.  It stops the flow of electricity.
• A light switch.

An example of an insulator is?

• metal
• plastic
• brass
• aluminum

The circuit that has only one path for electricity to travel around.

• parallel circuit
• series circuit
• no circuit

An example of a conductor is?

• metal paperclip
• glass marble
• wooden golf tee

All metals are conductors of electricity

• True

• False

Here are diagrams of four electric circuits.

Which of these circuits will work? Explain how you know.

Here is a diagram of an electric cable. Electric cables contain wires. The materials labelled A and B are made of plastic. Plastic is used to cover the wires because,

• Plastic is flexible and a good conductor

• Plastic is inflexible and a good insulator

• Plastic is flexible and a good insulator

• the material is not plastic but actually rubber.

If you use the circuit as shown in the diagram, to test different materials to see if they can carry electricity, why should you open the switch before changeing the test material. 

• to keep from getting an electric shock.

• to keep from breaking the battery

• to keep from breaking the light bulb

• to complete the circuit.

If you replace the paper clip with a plastic spoon, what is the plastic spoon acting as?

• A conductor
• A diode
• An insulator
• A switch

Which of these objects is an insulator?

• Copper Wire
• Paper Clip
• Steel Pole
• Rubber Gloves