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More
on the simple electric motor -
Complete this
explanation of how the motor works:
When the current flows through
the , the left side is pushed
and the side .
When the coil is vertical, the forces can not
it any further because there is no .
As the coil shoots past the vertical, the split ring commutator changes the
direction of the .
Now the point the other way around and
the coil is pushed around and around and around...
The Loudspeaker
Put these statements about how a loudspeaker
works in the correct order:
Word Link Up - link up
each description with the correct word
| Swaps the
current every half turn |
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| Converts
electrical energy into sound energy |
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| Converts
electrical energy into kinetic energy |
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| Turns around
on an axis |
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| Move quickly
forwards and backwards but not changing position |
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| Positive and
negative |
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The Relay
Number these sentences in the correct
order:
| Number
these sentences in the correct order |
order: |
| it turns the electromagnet
on |
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| The bulb
lights. |
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| The rocker
pivots |
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| When the
switch is closed, |
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| which
attracts the iron rocker. |
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| in the
output circuit. |
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| and closes
the contacts |
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