The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a square coil made from the same length of wire will be

The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a semi-circular coil made from the same length of wire will be

The magnetic field at the centre of the current carrying coil

The magnetic field at the centre of the current carrying coil

The magnetic field at the centre of current carrying coil is

The magnetic field at the centre of the current carrying coil is

The magnetic field at the centre of the current carrying coil is

The magnetic field at the centre of the current carrying coil :

Is the magnetic field at the centre of the current carrying circular coil parallel to the plane of the coil?

Write the expression for magnetic field at the centre of a current carrying circular coil.

The ratio of the magnetic field at the centre of a current carrying circular coil to its magnetic moment is x. If the current and radius both are doubled the new ratio will become