The self inductance of a solenoid of length L, area of cross-section A and having N turns is-
The self inductance of a solenoid of length L, area of cross-section A and having N turns is-
A. `mu_(0)Nl`
B. `mu_(0)NAl`
C. `mu_(0) (NA)/(l)`
D. `mu_(0) (N^(2)A)/(l)`
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Correct Answer - D
`B = mu_(0)ni = (mu_(0)Ni)/(l)`
`phi = NB xx A`
`= (mu_(0)N^(2)Ai)/(l)`
`L = (phi)/(3) = (mu_(0)N^(2)A)/(l)`
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