This symbol shows a/an __________.

• ammeter

• voltmeter

• current

• resistor

This symbol shows a/an __________.

• ammeter

• voltmeter

• light bulb

• current

This symbol shows a/an __________.

• resistor

• fuse

• open switch

• closed switch

What is the function of a switch in a circuit?

• to make the current hotter or colder

• to turn on and off the flow of current

• to show the pathway that current flows

• to add more power to the circuit

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

An incomplete circuit is shown.

To complete the circuit, a wire should be placed from?

• point D to point C

• point B to point C

• point A to point D

• point B to point D

This circuit has a battery, buzzer, and switch.

When the switch is closed, the buzzer sounds because?

• the switch gives energy to the battery

• the buzzer is made of special plastic

• the wires are cooled by the surrounding air

• the electricity can flow in a complete path

Would would best complete this circuit?

• A wire

• A switch

• A battery

• A light bulb

An electric current requires which of the following to flow?

• A closed path

• A switch

• An ammeter

• A light bulb

What is the S.I. unit for measuring electric current?

• volt

• millivolt

• ampere

• milliampere