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Q1
Figure 2 shows the inside parts of the alternator.
(c) The handle of the alternator is turned, causing the coil to rotate.
Explain why an alternating current is induced in the coil.
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(5)
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The coil moves through the magnetic field,
so it cuts the magnetic field lines.
This causes a potential difference to be induced across the coil.
Since there is a complete circuit, a current is induced in the coil.
Every half turn, the potential difference reverses direction,
so the current also changes direction every half turn.
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