A long horizontal wire `P` carries of `50 A`. It is rigidly fixed. Another fine wire `Q` is placed directly above and parallel to `P`. The wieght of wire `Q` is `0.075 N//m` and carries a current of `25 A`. Find the position of wire `Q` from `P` so that the wire `Q` remains suspended due to magnetic repulsion.

A long horizontally fiexed wire carries a current of 100 A directely above and parallel to it is a fine wire that carries a current of 20 A and weight 0.04 N/m The distance between the two wires for which the upper wire is just supported by magnetic repulsion is

P, Q and R long parallel straight wires in air, carrying currents as shown. The direction of resultant force on R is :-

A current carrying wire A is carrying current of 10 A from east to west and is fixed. Another wire B of maas 5 g, length 2 m and carrying a current 20 A is placed below the wire such that it remains suspended due to the magnetic force. Find the position of wire B and also indicate the direction of current in B. Take g = 10 m//s^(2) .

Two long, parallel straight wires are separated by a distance of 0.2 cm and carry current of 10 A and 8 A. Find the magnitude of the attractive force exerted on 1 m length of one wire by the other wire.

Three long straight and parallel wires carrying currents are arranged as shown in the figure. The wire C which carreis a current of 5.0 amp is so placed that it experiences no force. The distance of wire C from D is then

Two parallel wires carry currents of 20 A and 40 A in same direction. Another wire carrying a current anti- parallel to 20 A is placed midway between the two wires. The magnetic force on it will be

Two long, straight, parallel wires are 1.00m apart (as shown in Fig). The upper wire carries a current I_1 of 6.00A into the plane of the paper. What is the magnitude of the net field at Q?

A semicircular wire of radius 5.0 cm carries a current of 5.0 A. A magnetic field B of magnitude 0.50 T exists along the perpendicular to the plane of the wire. Find the magnitude of the magnetic force acting on the wire.