1.

What is the energy stored in the magnetic field if the current in a coil has a constant inductance of L henrys grows at a uniform rate?(a) LI/2(b) LI^2/2(c) L/2I(d) L/2I^2

Answer» Right choice is (b) LI^2/2

The explanation: EMF induced in the coil is Ldi/dt.

Energy=ei*dt=Lidi/dt*dt=Li^2/2.


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