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  4. Two identical ciruclar loops of metal wire are lying on a table without touching each other. Loop A carries a current which increases with time. In response, the loop g

Q. Two identical ciruclar loops of metal wire are lying on a table without touching each other. Loop A carries a current which increases with time. In response, the loop g

 1418  188 Electromagnetic Induction Report Error

Solution:

As the current in loop is increases with time, the flux it produces around is increasing with time.
Let loop A have an anticlockwise current through it.
Thus the flux is coming out of the plane of the loop inside.
It acts as a bar magnet with north pole outside the plane.
Thus, the magnetic flux due to this loop is increasing in the loop in the into the plane direction.
According to the Lenz Law, current is induced in loop such that the induced magnetic field opposes the change in the flux.
Thus the induced magnetic flux in loop is also out of the plane.
It also acts as a bar magnet with north pole out of the plane of loop .
Hence, they repel each other.