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PAPER 2
Magnetism
generator effect
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Created by
Marwa Jbara
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Cards (17)
What is the generator effect also known as?
Electromagnetic induction
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What happens when a wire moves through a magnetic field?
It induces a
potential difference
in the wire
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What occurs to the potential difference when the wire stops moving?
The potential difference
disappears
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Why does the potential difference disappear when the wire stops moving?
Because there is no change in the
magnetic field
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What happens to the direction of the potential difference when the direction is changed?
The direction of the potential difference
swaps
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What is required for the induced potential difference to generate current?
A complete
circuit
must be formed
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What happens if the wire is kept still while moving the magnets?
A change in the
magnetic field
induces
current
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What occurs when the wire moves back and forth without changing the magnetic field?
No
induced potential difference
or current
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How can the size of the induced potential difference be increased?
By changing the strength of the
magnetic field
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What effect does moving the wire or magnets more quickly have?
It increases the
induced potential difference
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How does shaping the wire into a coil affect the induced potential difference?
More
turns
increase the induced potential difference
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What are the key factors that increase the strength of the induced current?
Increase the strength of the
magnetic field
Move the wire or magnets faster
Add more turns to the
coil
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What happens when a magnet is moved into and out of a coil of wire?
It induces a
potential difference
in the coil
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What occurs when the direction of the magnet is changed?
The
direction
of
the
current
changes
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How can the direction of the current be changed besides moving the magnet?
By swapping the poles of the
magnets
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What is the key idea in electromagnetic induction?
A change in the
magnetic field
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What is the relationship between the movement of the magnetic field and the coil?
Movement induces a
potential difference
in the coil
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