Determine the magnetic induction at the centre of a circular coil of radius r carrying a current I with the help of the Biot-Savart law.

The magnetic induction at the center of a circular coil carrying current is

If B is the magnetic induction, at the centre of a circular coil of radius 'r' carrying a current is 1T , then its value at a distance of sqrt(3)r on the axis from the centre of the coil is

What is the magnetic induction at the centre of a circular coil of 10 turns, each of radius 5 cm and carrying a current of 5 A ?

The magnetic moment of a current carrying circular coil of radius r varies as

the intensity of the magnetic induction field at the centre of a single turn circular coil of radius 5 cm carrying current of 0.9 A is

State the Biot-Savart's law for the magnetic field due to a current carrying element. Use this law to obtain a formula for magnetic field at the centre of a circular loop of radius R carrying a steady current I, sketch the magnetic field lines for a current loop clearly indicating the direction of the field.