A long straight current carrying conductor is kept along the axis of circular coil carrying same current. What will be the mutual force between them?

At the centre of a circular coil carrying current, the magnetic filed is________.

On any plane perpendicular to a long straight current carrying conductor, the magnetic lines of force are circular. Discuss whether these circular lines of force are equidistant.

A long straight current carrying wire passes normally through the centre of circular loop. If the current through the wire increases, will there be an induced emf in the loop? Justify.

An electric current i enters and leaves a uniform circular wire of radius a through diametrically opposite points. A particle carrying a charge q moves along the axis of the circular wire with speed v. What is the magnetic force experienced by the particle when it passes through the centre of the circle ?

A cylindrical bar magnet is kept along the axis of a circular coil. If the magnet is rotated about the axis, will there be any current induced in that coil?

The current through a straight current carrying conductor is i, what will he the magnetic'induction at any point on the wire:

Calculate the force acting on a current carrying conductor in magnetic field.