Which among the following is/are the way to increase the strength of the current through the given solenoid?

Increasing the number of turns of the coil.

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Moving the magnet with greater speed towards or away from the solenoid.

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Reducing the strength of permanent magent used.

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Reducing the number of turns in the coil.

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Solution

The correct options are
A
Increasing the number of turns of the coil.

B
Moving the magnet with greater speed towards or away from the solenoid.

Following are the ways using which one can increase the strength of a current through the solenoid:
1. By increasing the number of turns of the coil: More the number of turns, more is the induced and hence more is the induced current.
2. By moving the magnet with greater speed towards or away from the solenoid: More the speed of the magnet, more is the change in the magnetic flux linked coil, hence more is the induced emf. More the induced emf, more is the induced current.

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