Circuits Practice Quiz

What is the power source in these systems?

• outlet

• wires

• battery

• lightbulb

What could fill in the question mark in the circuit?

• a sweater

• a plastic spoon

• a metal spoon

• green

If we add an object to the ? spot, why might the bulb still not light?

• it is an insulator

• it is a conductor

• the battery is too good

• purple

Which of these is a closed circuit?

• A (the left)

• B (the right)

What other device could NOT take place of the bulb?

• a motor

• a buzzer

• a fan

• another battery

What would make the bulb in circuit A brighter? (the left)

• taking out the battery

• add another light bulb

• add a battery

• changing the direction of the battery

What is the purpose of the rubber or plastic coating on a wire?

• it closes the circuit

• It serves as an insulator for protection

• It serves as a conductor

• It prevents the lightbulb from using too much energy

What is NOT required to make a working circuit that does a task?

• light bulb, fan, motor etc.

• battery

• wires

• Switch

A circuit is OPEN when...

• the switch is closed and completes the circuit

• the circuit is incomplete

• the bulb is lit

• a motor is used instead of a lightbulb

What does an ammeter measure?

• Current, the flow of electricity in a circuit

• voltage - the measure of difference in potential

• the power

• the lightbulb