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A solenoid of length 'l' has N turns of ...

A solenoid of length 'l' has N turns of wire closely spaced, each turn carrying a current i. If R is cross sectional radius of the solenoid, the magnetic induction at 'P'(only axial component).

A

`(mu_(0)iN)/(2sqrt(R^(2)+l^(2)))`

B

`(mu_(0)iN)/(2sqrt(l^(2)+4R^(2)))`

C

`(mu_(0)Ni)/(2R^(2)+l^(2))`

D

`(mu_(0)Ni)/(4sqrt(R^(2)+l^(2)))`

Text Solution

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The correct Answer is:
A
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