Question

Why Lenz's Law? Why must the solenoid make itself as a pole to oppose the pole of the bar magnet going into or out from it?
For example, when a bar magnet approaches a solenoid (that is not connected to any power source), a repulsive force is produced. The repulsive force is caused by the current flow in the solenoid that creates a like pole to repel the bar magnet. Why then? Why can't it just attract it? I found on some websites that it's related to work done and the conservation of momentum. Need some light please.

Answer 1

you see the solenoid's current is stable so when you get a magnet near it....the coil tries to repel it making alike poles...and when you get it out of it..it has already attained a stable flow so getting the magnet out would make it again unstable so it tries to attract it having unlike poles...