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 solenoid of length 'l' has N turns of wire closely spaced, each turn

1.	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).
Answer» `(mu_0I N)/2 sqrt(R^2+I^2))` `(mu_0iN )/( 2 sqrt(I^2 +4R^2))` `(mu_0 NI)/( 2 R^2 +I^2)` `(mu_0 Ni)/( 4 sqrt(R^2+I^2))` Answer :A

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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).

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