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 $\phi_1$ to $\phi_2$?

$\frac{-n(\phi_2-\phi_1)}{4Rt}$ $\frac{-n(\phi_2-\phi_1)}{Rt}$ $\frac{-n(\phi_2-\phi_1)}{5Rt}$ $\frac{-(\phi_2-\phi_1)}{nRt}$

$\frac{-n(\phi_2-\phi_1)}{5Rt}$

The correct answer is Option (3) → $\frac{-n(\phi_2-\phi_1)}{5Rt}$