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When the number of turns in a coil is do...

When the number of turns in a coil is doubled without any change in the length of the coil, its self-inductance becomes

A

four times

B

doubled

C

halved

D

unchanged

Text Solution

Verified by Experts

The correct Answer is:
A
`L prop N^(2) i.e. (L_(1))/(L_(2)) =((N_(1))/(N_(2)))^(2) rArr L_(2) =L_(1) ((N_(2))/(N_(1)))^(2) =4L_(1)`
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