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  4. When the North pole of a bar magnet is pushed towards the coil, the pointer in the galvanometer deflects. Fig. (i) show that it is the relative motion between the magnet and coil that is responsible for generation of electric current in the coil. In Fig. (ii), the bar magnet is replaced by a second coil C2 connected to a battery. The steady current in the coil C2 produces a steady magnet field. As coil C2 is moved toward the coil C1, the galvanometer shows a deflection. Again, it is the relative motion between the coils that induces the electric current. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/0186e2633396ebc6193886bfd67f3a71-.png /> Consider the motion of a magnet towards or away from coil C1 in Fig. (i) and moving a current carrying coil C2 towards or away from coil C1 in Fig. (ii). Magnetic flux associated with coil C1

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Q. When the North pole of a bar magnet is pushed towards the coil, the pointer in the galvanometer deflects. Fig. (i) show that it is the relative motion between the magnet and coil that is responsible for generation of electric current in the coil. In Fig. (ii), the bar magnet is replaced by a second coil $C_{2}$ connected to a battery. The steady current in the coil $C_{2}$ produces a steady magnet field.
As coil $C_{2}$ is moved toward the coil $C_{1}$, the galvanometer shows a deflection. Again, it is the relative motion between the coils that induces the electric current.
image
Consider the motion of a magnet towards or away from coil $C_{1}$ in Fig. (i) and moving a current carrying coil $C_{2}$ towards or away from coil $C_{1}$ in Fig. (ii). Magnetic flux associated with coil $C_{1}$

Electromagnetic Induction

Solution:

The motion of a magnet towards or away from coil $C_{1}$ in Fig. (i) and moving a current-carrying coil $C_{2}$ towards or away from coil $C_{1}$ in Fig. (ii), change the magnetic flux associated with coil $C_{1}$. The change in magnetic flux induces emf in coil $C_{1}$. It is this induced emf which causes electric current to flow in coil $C_{1}$ and through the galvanometer.