Write down the Biot - Savart law in the vector form. Hence find the magnetic field intensity in magnitude and direction at the centre of a circular coil carrying a current.

Write down the Biot-Savart law. Show its vector from.

Magnetic field intensity H at the centre of a circular loop of radius r carrying current I e.m.u is

Write down Biot-Savart law in vector from with an accompanying diagram.

Find the magnetic field at the centre of a square of side 'a' carrying current IA.

A student records the following data for the magnitudes (B) of the magnetic field at axial points at different distances x from the centre of a circular coil of radius a carrying a current I. Verify (for any two) that these observations are in good agreement with the expected the oretical variation of B with x.

Using Biot-Svart's law, derive the expression for the magnetic field in vector form at a point on the axis of a circular current loop.

Determine the magnetic field in the following cases applying Biot-Savart law : at the centre of a current carrying circular loop.

State Biot-Savart's law and express this law in the vector form.

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.

At the centre of a circular coil carrying current, the magnetic filed is________.