The laws of electromagnetism tell us that energy can be transferred from one object to another:

$(a)$ $A$ coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet is:
$(i)$ pushed into the coil with its north pole entering first?
$(ii)$ withdrawn from inside the coil?
$(iii)$ held stationary inside the coil?
$(b)$ Name the above phenomenon and mention the name of the scientist who discovered it. State the law that relates the direction of current in the coil with the direction of motion of the magnet.

$A$ coil of insulated wire is connected to a galvanometer. Explain what happens if a bar magnet with its north pole towards one face of the coil is:
$(i)$ moved quickly towards the coil,
$(ii)$ kept stationary inside the coil,and
$(iii)$ moved quickly away from the coil?

Choose the incorrect statement from the following regarding magnetic field lines.

What is the shape of the magnetic field lines inside a solenoid?

What are magnetic field lines? How is the direction of magnetic field at a point determined? Mention two important properties of magnetic field lines.