I was trying to understand the difference between the Back emf generated across Inductor due to change in current and Back Emf Generated across a coil that is rotating in presence of B Field.
Intuitively, a potential drop is quantifying the amount of energy dropped by a unit charge moving in a field. I hope this understanding is right.
Is it correct to say that potential drop in the inductor (due to self-inductance) is to the energy that is dropped by unit charges to build magnetic field around it? This drop-in energy of the electron is modelled as emf across inductor right?
Case2: Rotating Machine
When current flows through a coil due to a voltage source the rotational force(Torque) comes into picture due to the motion of charges along the conductor. So the coils start to rotate. Back Emf comes into the picture. The potential drop across the coil that is rotating in Presence of External B Field commonly referred to as Back emf in rotating machines.
Is this the energy spent by electrons to overcome the Lorentz Magnetic force** acting on electrons in the opposite direction of electron flow due to the fact that coil moves perpendicular to the field when rotating?
**The Lorentz Magnetic force opposing the flow of electron due to the coil(indirectly electron moving in the external B field: The force on the electron is given by F is given by in the below diagram:
Here Consider velocity v as the velocity of conductor of the coil due to coils under rotational motion. Since the conductor is moving the Charge is also moving.