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

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

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

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 each of them are made three times, the new ratio will become

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 each of them are made three times, the new ratio will become

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

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