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When the number of turns in the two circ...

When the number of turns in the two circular coils closely wound are doubled (in both) their mutual inductance becomes

A

becomes 4 times

B

becomes 2 times

C

becomes `(1)/(4)` times

D

remains unchanged

Text Solution

Verified by Experts

The correct Answer is:
A
`M=(mu_(0)N_(1)M_(1)A)/(l)`
`:.` M becomes 4 times
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NCERT FINGERTIPS-ELECTROMAGNETIC INDUCTION-Inductance
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  13. If 'N' is the number of turns in a coil, the value of self inductance ...

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  14. The self inductance of a long solenoid cannot be increased by

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  16. The self inductance of an inductance coil having 100 turns is 20 mH. C...

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