Question

A coil of wire having finite inductance and resistance has a conducting ring placed coaxially within it. The coil is connected to a battery at time t = 0, so that a time-dependent current $I_1\left(t\right)$ starts flowing through the coil. If $I_2\left(t\right)$ is the current induced in the ring and B(t) is the magnetic field at the axis of the coil due to $I_1\left(t\right)$, then the product of $I_2\left(t\right)$ and B(t)

• A. Increases with time
• B. Decreases with time
• C. Does not vary with time
• D. Passes through a maximum

Answer 1

The correct option is D

Passes through a maximum