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LED lights of chargers glow even after it is switched off. Which of the following causes this situation?

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in Physics – Class 12 by (135k points)
LED lights of chargers glow even after it is switched off. Which of the following causes this situation?

(a) LC Oscillations

(b) Phasors

(c) Power of the AC circuit

(d) Eddy currents

This question was posed to me during a job interview.

I need to ask this question from Alternating Current topic in section Alternating Current of Physics – Class 12

1 Answer

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The correct option is (a) LC Oscillations

To elaborate: This situation is caused due to LC Oscillations. These circuits consist capacitors and inductors, thus the energy keeps oscillating in the circuit even after the electric connection is disconnected. The combination of a capacitor and an inductor constitutes an LC oscillator circuit.

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