A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is `n` and the cross sectional area of the coil is `A`. When the coil turns through `180^(@)` about its diameter, the charge flowing through the coil is `Q`. the total resistance of the circuit is `R`. what is the magnitude of the magnetic induction?A. `(QR)/(nA)`B. `(2QR)/(nA)`C. `(Qn)/(2RA)`D. `(QR)/(2nA)`

A small coil is introduced between the poles of an electromagnet so th

1.	A small coil is introduced between the poles of an electromagnet so that its axis coincides with the magnetic field direction. The number of turns is `n` and the cross sectional area of the coil is `A`. When the coil turns through `180^(@)` about its diameter, the charge flowing through the coil is `Q`. the total resistance of the circuit is `R`. what is the magnitude of the magnetic induction?A. `(QR)/(nA)`B. `(2QR)/(nA)`C. `(Qn)/(2RA)`D. `(QR)/(2nA)`
Answer» Correct Answer - D

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