What will happen to the compass needles when a current flows through the wire?
The needles will line up with the magnetic field created by the current carrying wire
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15
Define the motor effect...
A current carrying wire placed in an external magnetic field will experience a force.
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seesaw
Swap points!
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magnet
Take 15 points!
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fairy
Take points!
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25
baam
Lose 10 points!
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15
Which pole is X?
North
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15
When the activity of the sun is high, charged particles from solar winds can flow along the earth's magnetic field lines and enter the atmosphere near the poles. What visual effect does this create?
The Aurora borealis (northern lights)
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15
The magnetic field lines of a bar magnet are invisible to us. What could you use to visualise the field?
Sprinkle iron filings into the field or use a compass needle in the field.
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15
The north pole of a bar magnet is brought towards an Aluminium bar, what happens?
Nothing, Aluminium is non magnetic
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15
Explain how the motor effect causes this motor to spin
The left hand side of the coil experiences a downward force, the right hand side of the coil experiences an upward force.
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baam
Lose 25 points!
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star
Double points!
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fairy
Take points!
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lifesaver
Give 20 points!
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15
What does the Earth's magnetic field protect us from?
Solar winds
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15
Which pole of the Earth's magnetic field is at the "North Pole"?
The south pole
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boom
Lose 50 points!
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fairy
Take points!
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shark
Other team loses 25 points!
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banana
Go to last place!
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15
Where is the strongest part of the magnetic field created by a bar magnet?
At the poles
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15
What will happen to the compass needle if the bar magnet is rotated 180o?
