Two coaxial circular loops `L_1` and `L_2` of radii `3cm` and `4cm` are placed as shown in figure. What should be the magnitude and direction of the current in the loop `L_2` so that the net magnetic field at the point O be zero?

A circular loop of radius R carries current I_2 in a clockwise direction as shown in figure. The centre of the loop is a distance D above a long, straight wire. What are the magnitude and direction of the current I_1 in the wire if the magnetic field at the centre of loop is zero?

A circular loop of radius R carries current I_2 in a clockwise direction as shown in figure. The centre of the loop is a distance D above a long, straight wire. What are the magnitude and direction of the current I_1 in the wire if the magnetic field at the centre of loop is zero?

Two circular loops of radius 6 cm and 8 cm are kept in Y-Z plane with their centres at (0, 0, 0) and (14 cm, 0, 0). Current in the first loop is 1 A and is in an anticlockwise direction, when seen from the second loop. Calculate the magnitude and direction of current in the second loop such that net magnetic field at point (8 cm, 0, 0) is zero.

A triangular loop is placed in a dot o. magnetic field as shown in figure. Find the direction of induced current in the loop if magnetic field is increasing.

A triangular loop is placed in a dot o. magnetic field as shown in figure. Find the direction of induced current in the loop if magnetic field is increasing.

Two small circular loops, marked (1) and (2), carrying equal currents are placed with the geometrical axes perpendicular to each other as shown in figure. Find the magnitude and direction of the net magnetic field produced at the point O.

Two concentric circular loops of radii 1 cm and 20 cm are placed coaxially. Find mutual inductance of the arrangement.

A square loop of side l carries a current i. it is placed as shown in figure. Find the magnetic moment of the loop.