The two parallel circular loops of wire shown in fig each have a radius R = 20 cm and are separated by a distance a = 0.5 cm. The bottom loop is held fixed and the top loop hangs from one end of the arm of an equal arm balance. Since a is much smaller than R, the magnetic field produced by one loop at the other is practically the same as if both were long straight wires. if the curret in each loop is 20 A, how big is the force of attraction of one loop for the other?

The two parallel circular loops of wire shown in fig each have a radius R = 20 cm and are separated by a distance a = 0.5 cm. The bottom loop is held fixed and the top loop hangs from one end of the arm of an equal arm balance. Since a is much smaller than R, the magnetic field produced by one loop at the other is practically the same as if both were long straight wires. if the current in each loop is 20 A. How much additional mass m must be added to the right-hand pan of the balance to keep the loops separated by 0.5 cm, when the currents are turned on?

Can a magnetic field line from a closed loop? Explain.

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

A rectangular loop of metallic wire is of length a and breadth b and carries a current I . Find the magnitude of magnetic field at the centre O of the loop.

Obtain an expression for the mutual inductance between a long straight wire and a square loop of side a as shown in Fig. 6.21. :

State one main function of the following: Loop of henle?

Two concentric circular loops of radii 1 cm and 20 cm are placed coaxially. If the current passed through the outer loop is changed at a rate of 5 A/ms , find the emf induced in the inner loop. Assume the magnetic field on the inner loop to be uniform.

What is the magnitude of the induced currents in circular loop KLMN of radius r if the straight wire PQ carries a steady current of magnitude i ampere?

Two different loops are concentric and lie in the same plane. The current in the outer loop is clockwise and increasing with time. The induced current in the inner loop then is

A circular loop of radius 0.3 cm lies parallel to amuch bigger circular loop of radius 20 cm. The centre of the small loop is on the axis of the bigger loop. Obtain the mutual inductance of the two loops.