In the given diagram, a coil B is connected to low voltage bulb L and placed parallel to another coil A as shown. Explain the following observations:
- Bulb lights.
- Bulb gets dimmer if the coil B moves upwards.
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- Bulb lights up due to induced current in B because of change in flux linked with it as a consequence of continuous variation of magnitude of alternative current flowing in A.
- When coil B moves upward, the magnetic flux linked with B decreases and hence lesser current is induced in B.
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