A solenoid of length T 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 'O' is.

A solenoid of length T has N turns of wire closely spaced, each turn c

1.	A solenoid of length T 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 'O' is.
Answer» `(mu_0iN )/( 2 SQRT(R^2 +I^2))` `(mu_0 iN )/( 2 sqrt( I^2+ 4R^2))` `(mu_0Ni )/( 2R^2 +I^2)` `(mu_0 NI )/( 4 sqrt(R^2 +I^2))` ANSWER :B

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A solenoid of length T 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 'O' is.

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