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Inductors - Technical MCQs

Q1:

What will happen when an inductor's magnetic field collapses?

A Current will double.

B Voltage will be induced.

C A new field will expand.

D Counter emf will be high.

ANS:B - Voltage will be induced.

Because 1st laws of conservation of energy, the energy stored in form of the magnetic field got converted back to electrical energy by self-induction to the circuit.