Q

Two identical coils are placed near each other. If the current in the first coil is switched off suddenly, what will happen in the second coil?

RRB Group D 10 Aug, 2026 (4:30 PM - 6:00 PM) 2026
✓ Answer: C A current is momentarily induced in the second coil in a direction that tries to keep the magnetic field constant.
Switching off the first-coil current changes the magnetic flux through the second coil. By Faraday–Lenz law, a momentary induced current opposes the change in flux.
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