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A solenoid of length l metre has self in...

A solenoid of length l metre has self inductance L henry. If number of turns are doubled, its self inductance

A

Becomes 2 L henry

B

Becomes 4 L henry

C

Remains same

D

Becomes `(L)/(sqrt(2))` henry

Text Solution

Verified by Experts

The correct Answer is:
B
For a solenoid, self inductance `L=(mu_(0)N^(2)A)/(l)`
`(L)/(L.)=((N)/(N.))^(2)=((N)/(2N))^(2)=(1)/(4)rArr L.=4 L` henry
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