a coil of wire having inductance and resistance has a conducting ring placed coaxially within it. the coil is connecteedto a battery at time t=0, so that a time dependentcurrent I₁(t) start flowing through the coil. if I₂(t)is the current induced in the ring, and B(t) is magnetic field at the axis of coil due to I₁(t), then as a function of time (t.0) the product I₂(t) B(t)-----

1. increases with time
2. decreases with time
3. does not vary with time
4. passes through a maximum