Field at the centre of a circular coil of radius `r`, through which a current `I` flows is

Magnetic field at the centre of a circular coil of rradius R due to current I flowing through it is B. The magnetic field at a point along the axis at distance R from the centre is

Magnetic field at the centre of a circular coil of radius R due to curent i flowing through it is B. The magnetic field at a point along the axis at distance R from the centre is :

How will the magnetic field induction at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

How will the magnetic field intensity, at the centre of a circular coil carrying currents, change if the current through the coil is doubled and radius of the coil is halved ?

How will the magnetic field induction at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

How will the magnetic field intensity at the centre of a circular coil carrying current change, if the current through the coil is doubled and the radius of the coil is halved?

The magnetic field normal to the plane of a coil of N turns and radius r which carries a current I is measured on the axis of the coil at a distance h from the centre of the coil. This is smaller than the field at the centre by ther fraction.