When current flowing in an inductive circuit is switched off, the induced current will be
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → in the same direction as the main current
By Lenz's law the induced emf in a coil opposes the change of current that produces it. When the circuit is switched off, the current falls, so the induced current tries to keep it flowing, that is, it flows in the same direction as the main current.
Option (1) in the opposite direction as the main current — Incorrect. The induced current opposes the main current only when the main current is growing (switching on).
Option (2) equal to the main current — Incorrect. Its size depends on how fast the current falls and on the inductance; it is not fixed at the main current.
Option (3) in the same direction as the main current — Correct. It opposes the decrease of current, so it adds to the main current.
Option (4) zero — Incorrect. The flux through the coil changes on switching off, so an emf and a current are induced.
NCERT (2026-27):
Self-Inductance – “… Thus, the self-induced emf always opposes any change (increase or decrease) of current in the coil.”
Self-Inductance – “… This expression reminds us of mv2/2 for the (mechanical) kinetic energy of a particle of mass m, and shows that L is analogous to m (i.e., L is electrical inertia and opposes growth and decay of current in the circuit).”