…Circuit Breakers…

…but first…

…the bimetallic strip…

Brass

Iron

…which will bend when heated…

Brass

Iron

…as the metals expand differently…

…the thermal circuit breaker…

…makes use of the bimetallic strip…

now:

•Stick in the diagram of the thermal circuit breaker

• Write an explanation of the how the thermal circuit breaker works

• Write a sub-heading: the thermal circuit breaker

•Stick the diagram and explanation of the bimetallic strip into your book

• Draw a picture showing what the thermal circuit breaker looks like when the current is too large

…and now…

…the Magnetic Circuit Breaker (MCB)…

…which makes use of the magnetic effects of large currents…