Electricity and circuits

Electricity and circuits

Multiple Choice

What is current?

• The rate of flow of electrons through a conductor

• Potential difference between two points in a conductor

• Electrical energy needed to move the electric charges from one point to another point in a conductor

• Ability of a conductor to resist the flow of electric current

Multiple Choice

What is a circuit?

• an outlet or switch

• a path which an electric current flows

• a poor conductor

Multiple Choice

A student is building a circuit that will convert electrical energy into light energy. What materials does the student need to complete his circuit?

• Wire, battery, and bulb

• Battery, switch and wire

• Switch, bulb, and battery

• Bulb, wire and switch

Multiple Choice

A fifth grade class constructed this circuit. Which of these objects most likely made the light glow when connected to points X and Y?

• plastic straw

• cotton string

• aluminum foil

• rubber eraser

Multiple Choice

Which of these substances conducts electricity the best?

• wood

• brick

• copper

• plastic

Multiple Choice

Why is electrical wiring usually are covered with a layer of plastic?

• To make it look pretty

• To help electricity flow along the wire

• To make it safe

• To add more energy

Multiple Choice

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

• Because copper insulate electricity

Multiple Choice

A student began building a circuit to light a bulb. The student only had wires and a bulb. What else does the student need to make a complete circuit.

• A battery that has energy.

• Wire that is insulated.

• A switch that is open.

• Another bulb of the same size.

Multiple Choice

Choose the correct sentence.

• This circuit will work because it is an open circuit.

• This circuit will work because it is a closed circuit.

• This circuit will NOT work because it is an open circuit.

• This circuit will NOT work because it is a closed circuit.

Multiple Choice

If there is a break in an electrical circuit then...

• the electricity will still flow

• the electricity will jump over the gap

• the electricity will not flow

• you will get electrocuted

Multiple Choice

this is the symbol for a _____?

• switch

• light

• battery

• wires

Multiple Choice

This is the symbol for a _____?

• Fuse

• Resistor

• Heater

• Strip light

Multiple Choice

This is the symbol for a _____?

• Fixed resistor
• Variable resistor
• Fuse
• Box

Multiple Choice

This is the circuit symbol for ...

• an AC current source
• a DC current source
• a battery
• a single cell

Multiple Choice

what is this symbol for?

• light bulb

• cell

• battery

• resistor

Multiple Choice

This is the symbol for a _____?

• Variable resistor
• Thermistor
• Resistor
• Fuse

Multiple Choice

This is the symbol for a _____?

• Lamp

• Water wheel

• Loudspeaker

• Motor

Multiple Choice

This is the symbol for

• An Ammeter

• A Voltmeter

• A Meter

• A Motor

Multiple Choice

This is the circuit symbol for ...

• an AC current source

• a DC current source

• an ammeter

• a voltmeter

Multiple Choice

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter

Multiple Choice

Why is a switch used in a circuit?

• To complete or break a circuit

• To save energy

• To prevent electric shocks

• To make the bulb glow easily

Multiple Choice

The electric current in a closed circuit always flows from the ____ terminal of the electric cell to the _____ terminal.

• Negative to positive

• Positive to negative

• Positive to positive

• None of these

Multiple Choice

An electric bulb has ____ terminals.

• 3

• 4

• 1

• 2

Multiple Choice

An electric bulb has ____ terminals.

• 3

• 4

• 1

• 2