The current I em units, flowing in a coil of a tangent galvanometer is – McqOptions

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1.	The current I em units, flowing in a coil of a tangent galvanometer is given by the expression wherer = Mean radius of the galvanometer coil.N = Number of turns of the galvanometer coil.H = Horizontal component of earth magnetic fieldϕ = Deflection of galvanometer magnetic needle.
A.	I = (Hr/2πN)*Cosϕ
B.	I = (2πNr/H)*Tanϕ
C.	I = (Hr/2πN)*Tanϕ
D.	I = (2πNr/H)*Cosϕ
Answer» D. I = (2πNr/H)*Cosϕ

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