Electrical Circuits Quiz

What is the primary function of a conductor in an electrical circuit?

• To store electrical energy

• To resist the flow of current

• To allow the flow of electric current

• To control voltage

All of the objects below are conductors of electricity EXCEPT:

• an aluminum nail

• a rubber band

• a copper penny

• a steel fork

In a simple series circuit with three light bulbs, if one bulb burns out, what happens to the other bulbs?

• They all go out.

• They get brighter.

• They stay the same brightness.

• They flicker.

Students hooked up a battery and bulb with wires as shown. For the bulb to light, the object the students place in the space between the two wires must be -

• made of plastic or wood

• a conductor of electricity

• at room temperature

• an electrical insulator

Mariel charges her iPod with a cord that plugs into an electrical socket on the wall. The cord has a plug with metal prongs. Why are the prongs made of metal? The prongs are made of metal because metal is a good _______ of electricity.

• conductor
• insulator

Materials that transfer heat easily are called conductors. Click on all items that are conductors.

• screw

• paper

• metal spoon

• pan

• paper clip

Student attached a buzzer to a battery with a switch. The buzzer is not making any noise. Which of the following changes would most likely make the buzzer produce sound?

• remove the battery

• add more wire

• use a bigger buzzer

• close the switch

Use the diagram to answer the question. What must be done to allow electricity to flow?

• The switch (A) must be opened to create an open circuit.

• The battery (E) must be turned around so that electricity can flow from positive to negative.

• The wire (D) must be connected from the bulb (C) to the switch (A) to create a closed path.

• The wire (F) must be connected to the switch (A) to make a closed path.

Use the diagram below to answer the question. Which statement is true?

• The light bulb would not turn on, because this diagram does not demonstrate a closed path.

• The light bulb would turn on, because the diagram shows a complete circuit.

• The light bulb would turn on, because the diagram shows that the light bulb is connected to the battery for electricity.

• The light bulb would not turn on, because the diagram must include a switch.

Electrical insulators stop the flow of electricity. Click on the items that are good insulators of electricity.

• Plastic

• Glass

• metal spoon

• Rubber

• Paper