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Magnetic Field Due to Straight Current Carrying Conductor

On making a c...

Question

On making a coil of copper wire of length l and coil radius r, the value of self inductance is obtained as L. If the coil of same wire, but of coil radius r/2, is made, the value' of self inductance will be-I

A

2L

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B

4L

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C

L/2

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D

L/3

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Solution

The correct option is C L/2
Hence, option $(C)$ is correct answer.

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