A coil of wire having finite inductance and resistance has a

Last updated: 6/7/2023

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 t starts flowing through the coil If 2 t is the current induced in the ring and B t is the magnetic field at the axis of the coil due to t then as a function of time t 0 the product 2 t B t 1 Increases with time 2 Decreases with time 3 Does not vary with time 4 Passes through a maximum 1 2 3 4