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20
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What is a generator?
A device that generates electric current by spinning an electric coil between the poles of a magnet.
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Okay!
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15
×
How do electromagnetic poles need to be arranged in order to levitate a bar magnet?
Alternating north/south.
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10
×
What is magnetic levitation?
The lifting of an object by use of magnetic forces.
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25
×
What are the similarities and differences between electric motors and generators?
Wow, you really know your stuff! / Sorry, we were looking for...
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baam
Lose 20 points!
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fairy
Take points!
5
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15
20
25
×
shark
Other team loses 15 points!
Okay!
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thief
Give points!
5
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25
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baam
Lose 10 points!
Oops!
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gold
Win 50 points!
Okay!
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shark
Other team loses 25 points!
Okay!
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thief
Give points!
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25
15
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What happens when a loop moves past the pole of a magnet?
The direction of the magnetic force changes.
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banana
Go to last place!
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rocket
Go to first place!
Okay!
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gift
Win 25 points!
Okay!
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baam
Lose 20 points!
Oops!
15
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How is magnetic levitation similar to and different from buoyancy?
Similar: upward force; different: cause of force/direction
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15
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What does a generator consist of?
A coil of wire and a magnetic field (created by a magnet).
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25
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How does a generator create an electric current?
Energy turns the axle, the coil moves through the magnetic field, creating electric current, wires attached to the loop allow process to repeat.
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seesaw
Swap points!
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rocket
Go to first place!
Okay!
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rocket
Go to first place!
Okay!
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thief
Give points!
5
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25
10
×
What do we call electric currents that rapidly change direction?
Alternating current.
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10
×
How fast can maglev trains go?
400km/h. (310mph).
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