GENERATORS
2 marks · EasyA student rotates a coil in a magnetic field but moves it very slowly. What will happen to the voltage induced, and why?
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The induced voltage will be small, because the coil is cutting the magnetic field lines slowly.
Also accept: A small voltage is induced because fewer field lines are cut per second
Common mistakes: The voltage will be zero
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Marking points
B1 · 1 mark · Recognises that the induced voltage is small
B2 · 1 mark · Explains it is because the field lines are being cut slowly (low rate)
Worked solution
The induced voltage will be small because the coil is not cutting many magnetic field lines per second.