Question

Which of the following statements is true for an ideal inductor with no resistance in series to a fully charged capacitor?

a) When the charge in the capacitor is maximum so is the current through the inductor

b) At any time the stored electric energy is equal to the stored magnetic energy

c) The energy is transformed from electric to magnetic potential energy but the total energy decreases

d) The stored electric field energy is dissipated through the inductor

e) As the capacitor is discharging the current in the inductor is decreasing

Answer 1

Only option (e) is correct which states that "As the capacitor is discharging the current in the inductor is decreasing"

Other options are incorrect because

(A) when charge is maximum on the capacitor, at that instant the current through inductor is zero as all the energy is stored in the form of electric energy in the capacitor.

B) at anytime the stored electric energy is not equal to the magnetic energy but the sum of these two energies is always conserved at every instant.

C) the total energy does not decrease in the given case as there is no resistance in the circuit.

D) the stored electric energy is not dissipated through the inductor.