According to the Right-Hand Thumb Rule,what does the thumb indicate?

What is the direction of magnetic field lines inside a bar magnet?

On which principle does an electric bell work?

$A$ 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?

State the principle of an electric generator.

What constitutes the field of a magnet?