$A$ current-carrying solenoid behaves like a bar magnet.

The magnetic field produced by a current in a straight wire has no poles.

The magnetic field around a current-carrying straight conductor is:

Describe the working of an $AC$ generator with the help of a labelled circuit diagram. What changes must be made in the arrangement to convert it to a $DC$ generator?

$A$ 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?

The direction of the magnetic field produced by a current-carrying straight wire depends on which of the following?