Closed and Open Circuits

Which of the following is true about electrical circuits?

• every circuit needs a switch that can start and stop the flow of electricity

• electricity can only flow if the circuit is open

• electricity can only flow if the circuit is closed

• they have to involve a wire made of insulating material

Is the circuit in the picture opened or closed?

• opened

• closed

• neither

Is the circuit in the picture opened or closed?

• opened

• closed

• neither

Why is the light bulb not lit?

• the circuit is open because the switch is open

• the circuit is closed because the switch is closed

• the battery is dead and you need a new battery

• the wires are not connected to the battery

What do you need to do to this picture to make the light bulb light up?

• change the battery out

• attach an extra wire

• close the switch and complete the circuit

• open the switch and complete the circuit

Electricity can only flow if the circuit is a/an _____________ loop.

• opened

• closed

• small

• large

What kind of circuit is this?

• Open Circuit

• Closed Circuit

This circuit has a battery, buzzer, and switch.
When the switch is closed the buzzer will sound because -

• the switch gives energy to the battery

• the buzzer is made of special plastic

• the wires are cooled by the surrounding air

• electricity can flow in a complete path

Tags

NGSS.4-PS3-2

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.

Which circuits will allow the bulb to light?

• A and C

• Only B

• B, D, and E

• B and D only

Tags

NGSS.MS-ETS1-2