In a region where magnetic field lines are close to each other,what is the nature of the magnetic field?

Two long parallel wires are hanging freely. If they are connected to a battery $(i)$ in series and $(ii)$ in parallel,what would be the effect on their positions?

Describe an activity to show that the magnetic field produced by a given current in a wire decreases as the distance from the wire increases.

The horizontal component of the Earth's magnetic field at a place is uniform and its direction is from south to north. $A$ high current flows through a horizontal power line at this place from west to east. Consider two points $A$ and $B$ at equal distances from the wire,respectively above and below it. Giving reasons,explain where the magnetic field is stronger: at $A$ or at $B$.

What is the coil-like structure made of insulated copper wire wound in a cylindrical shape called?

An electric generator is a device that converts electrical energy into mechanical energy.