Circuit Breaker

This is...

• a fixed contact

• a switch

• a moving contact

• an electro-magnet

• a catch

This is...

• a fixed contact

• a switch

• a moving contact

• an electro-magnet

• a catch

This is...

• a fixed contact

• a switch

• a moving contact

• an electro-magnet

• a catch

This is...

• a fixed contact

• a switch

• a moving contact

• a terminal

• a catch

This is...

• a fixed contact

• a switch

• a moving contact

• a terminal

• a catch

This is...

• a fixed contact

• a switch

• a moving contact

• a terminal

• a catch

Please read and choose the correct option.

A circuit breaker has a switch on the outside of the box. You can turn this on or off.

You can turn the circuit breaker switch on or off.

• True

• False

Please read and choose the correct option.

When the switch is up (on), electricity flows into the circuit breaker through the bottom terminal.

When the switch is ___ (on), electricity flows into the circuit breaker through the bottom ___.

• on, terminal

• up, terminal

Please read and choose the correct option.

It flows through the electro-magnet. It then flows up to the moving contact and across the fixed contact.

It flows through the ___. It then flows up to the moving contact and across the ___ ___.

• electro-magnet, contact

• electro-magnet, fixed contact

Please read and choose the correct option.

Then the electricity flows out of the circuit breaker at the top terminal.

Then the electricity flows out of the circuit breaker at the bottom terminal.

• True

• False