| Vocabulary | Electromagnets | Transformers | Magnetism From Electricity | Misc. |
|---|---|---|---|---|
|
What is a magnet?
any material that attracts iron or is made up of iron
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What does electromagnets run on?
electricity
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What uses electromagnetism to transfer power between two circuits?
A Transformer
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What is a solenoid?
a coil of wire that produces a magnetic field when carrying an electric current
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What is a electromagnetic induction?
The process by which an electric current is made by changing a magnetic field
|
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What are magnetic poles?
points on a magnet that have opposite magnetic qualities
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What does an electromagnet produce?
an electric current produces a magnetic field
|
A transformer has
two coils
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What is a electromagnet made up of?
solenoid
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The source in nuclear power plants is?
Thermal Energy
|
|
What is a magnetic force?
where magnets exert each other
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What happens when the current is switched on?
the electromagnet becomes magnetic
|
If the secondary coil has fewer turns of wire than the primary than
the voltage is low
|
To make an electromagnet stronger, you increase the
loops per second in the solenoid
|
The number of loops in the primary and secondary coils of a transformer determines whether it
increases or decreases
|
|
What are ferromagnets?
Magnets made with these metals have strong magnetic properties
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If an electromagnet is a ferromagnet, than what is wrapped around the ferromagnet?
a coiled wire
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If a transformers voltage is high than the current must be
low
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What is an electric motor?
a device that changes electrical energy into mechanical energy
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A step-up transformer increases the voltage of an
alternating current
|
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What is an electromagnet?
a magnet made by an electric current
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Who was the scientist that discovered electromagnets?
Danish
|
Transformers step up the voltage for
power lines
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What is a commutator
attached to the armature to reverse the direction of the electric current in the wire
|
An electric generator
uses electromagnetic induction to change mechanical energy into electrical energy
|
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