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

A long horizontally fixed wire carries a current of 100 A directly 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

A long horizontal rigidly supported wire carries a current i_a of 100 A. Directly above it and parallel to its is a fine wire that carries a current i_b of 20 A and weighs 0.073 N/m. How far above the lower wire should the second wire be kept if we wish to support it by magnetic repulsion? Given permeability constant mu_0= 4pi xx 10^-7 Wb A^-1m^-1 .

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

A straight wire 5m long is placed parallel to an infinitely long straight wire carrying current 5A. The distance between the two wires is 10 cm and the 5m long wire is carrying current 2A. The force on the shorter wire is :

Two parallel wires carry currents of 10 A and 40 A in opposite directions.Another wire carrying a current antiparallel to 10 A is placed midway between the two wires.The magnetic force on it will be

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

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

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