Use Biot-Savart's law to obtain the expression for the magnetic field at the centre of a coil in the form of a square of sides 2a carrying a current 'I'.

Caculate the magnetic field induction at the centre of a coil bent in the form of a square of side 10 cm carrying current of 10 A.

Derive an expression for the magnetic field.at the centre of a current carrying coil.

Derive an expression for magnetic field at the centre of circular current carrying coil.

A straight wire of length L is bent into a semicicular loop. Use Biot-savart law to deduce the expression for the magnetic field at its centre due to current I passing thorugh it.

Write Biot Savart expression for the magnetic field due to a current element in vector form.

Mangetic field intensity at the centre of a coil of 50 turns, radius 0.5 m and carrying a current of 2 A is

Using Biot Savart’s law derive an expression for the magnetic field due to a circular current carrying loop at any point on its axis.

Using Biot-Savart's law, derive an expression for magnetic field at the centre of a current carrying circular coil. What will be the direction of this magnetic field?