Decay of current in inductor | Problems on inductor

In the following circuit the switch is closed at t=0 .Intially there is no current in inductor.Find out current the inductor coil as a function of time.

An a.c. voltage is applied to a pure inductor L, drives a current in the inductor. The current in the inductor would be

An a.c. voltage is applied to a pure inductor L, drives a current in the inductor. The current in the inductor would be

The magnetic potential energy stored in a certain inductor is 25mJ , when the current in the inductor is 60 Ma . This inductor is of inductance

The potential difference across a 150 mH inductor as a function of time is shown in figure. Assume that the initial value of the current in the inductor is zero. What is the current when t=2.0 ms ? and t = 4.0 ms ?

In an oscillating LC circuit the maximum current on the inductor is i. The current in the inductor when the energy is stored equally between the electric and magnetic fields is-