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.

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

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

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

How does the magnetic moment of a circular coil vary with its radius?

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 ?

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.

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

Ratio of magnetic fields at the centre of a current carrying coil of radius r and at a distance 3r on its axis is

Obtain for the magnetic induction, vector at a point on the axis of a circular loop of radius r, at a distance x. If i be the current passing through the loop then draw the lines of the forces for the magnetic field.

The magnetic field at the centre of a loop of radius carrying current I is B_1 .The magnctic field at a distance from the long straight current canying wire is B_2 . Compare B_1 & B_2 .