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A long solenoid of N turns has a self-in...

A long solenoid of `N` turns has a self-induced `L` and area of cross-section A. When a current `i` flows through the solenoid, magnetic field inside it has magnitude `B` . The current `i` is equal to

A

`(BAN)/(L)`

B

`BANL`

C

`(BN)/(AL)`

D

`(B)/(ANL)`

Text Solution

Verified by Experts

The correct Answer is:
A
`L=(mu_(0)N^(2)A)/(l) implies mu_(0)=(Ll)/(N^(2)A)i`
`i=(BNA)/(L)`
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