In the given figure the North-pole of a bar magnet is being pushed towards the circular loop with constant speed.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → loop has North polarity towards the North pole of approaching magnet
As the North pole moves towards the loop, the magnetic flux through the loop increases. By Faraday's law a current is induced, and by Lenz's law it flows in the direction that opposes the increase in flux, that is, it opposes the approach of the magnet. The face of the loop towards the magnet must therefore act as a North pole and repel it.
NCERT (2026-27):
Lenz’s Law and Conservation of Energy – “… In Fig. 6.1, we see that the North-pole of a bar magnet is being pushed towards the closed coil. As the North-pole of the bar magnet moves towards the coil, the magnetic flux through the coil increases. … This is possible only if the current in the coil is in a counter-clockwise direction with respect to an observer situated on the side of the magnet. Note that magnetic moment associated with this current has North polarity towards the North-pole of the approaching magnet.”