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Work Function

If a Bismuth ...

Question

If a Bismuth rod is introduced in the air coil as shown then current in the coil

A

increases

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B

remains unchanged

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C

decrreases

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D

none of these

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Solution

The correct option is A increases
Inductance $L$ of air coil will decrease as Bismuth ( $B i$ ) is diamagnetic, and hence reactance will decrease
therefore
$∴ I = \frac{V}{X_{L}}$ will increase

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