I studied electromagnetism and I am currently working with Inductors.
I could not figure out the physical reason based on electromagnetics on why inductor current lags the applied voltage by 90 degrees?
Everywhere I find the Formula as the starting point of explanation which is partially satisfying.
Induced EMF =L di(t)/dt
From the above equation, I understood that when there is a change in current there will EMF induced in the coil terminals. But How this induced EMF makes the current to lag the supply voltage V(t) = Vm*sin(wt)? (Please don't just differentiate and say there is a lag, I am looking for a physical sense on why this happens)
Lets us consider the AC voltage is applied across the terminal at time t=0; At this time there is almost no current. From this transient state how the steady-state is reached where the current is delayed with respect to the voltage?
Can someone help me to figure out why the current lags the Supplied voltage by using electromagnetism, the motion of Charges or any other basic concepts?