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Physics Question on Induced Magnetic Fields

A coil having 'n' turns and resistance 'R'Ω is connected with a galvanometer of resistance '4R' Ω. What is the induced current in the circuit when this combination (coil+galvanometer) is moved in time t from a magnetic flux Φ1 to Φ2?

A

−n(Φ2−Φ1)4Rt \frac{-n(Φ_2-Φ_1)}{4Rt}

B

−n(Φ2−Φ1)Rt \frac{-n(Φ_2-Φ_1)} {Rt}

C

−n(Φ2−Φ1)5Rt\frac{-n(Φ_2-Φ_1)}{ 5Rt}

D

(Φ2−Φ1)nRt\frac{(Φ_2-Φ_1)}{ nRt}

Answer

−n(Φ2−Φ1)5Rt\frac{-n(Φ_2-Φ_1)}{ 5Rt}

Explanation

Solution

The correct option is (C): −n(Φ2−Φ1)5Rt\frac{-n(Φ_2-Φ_1)}{ 5Rt}