Question

What will be the directions of induced current in each coil when a bar magnet is moved in the direction indicated by the arrow between two coils $PQ$ and $CD$.

Answer 1

Hint:Here we have to apply the concept of motional emf.An emf is considered a motional emf, caused by motion due to a magnetic field.

Complete step by step answer:
Three variables depend on the magnetic flux: the power of the magnetic field, the area over which the field lines travel, and the field's direction to the surface area. A resulting change in magnetic flux exists if one of these concentrations varies.Between the electric force and the magnetic force, there are several relations. The idea that a moving electric field generates a magnetic field and, conversely, an electric field is created by a moving magnetic field is part of why various forms of the same force are now thought to be electric and magnetic forces. This classic fusion into what is considered the electromagnetic force between electrical and magnetic forces is the inspiration for beginning the process to unify other fundamental forces.We get an induced EMF by Faraday's Law if there is a changing magnetic flux through a loop. If the shifting emf is due to a conductor in a magnetic field action of some kind, we would call it a motional emf.As seen in the figure, if the magnet shifts left, then the magnetic field decreases in the left direction through the $PQ$ coil. In $PQ$,then, the present flow is from $Q$ to $P$. Likewise, the magnetic field of the $CD$ coil rises in the left direction.

Thus, the current in the $CD$ coil is from $C$ to $D$.

Note:Here we have to observe the direction of the compass as to where it is pointing. If the compass needle would have pointed in the left direction the answer would have been different.