Current `i_(1) and i_(2)` are flowing in the same direction through tow long parallel wires kept at a distance d apart. Determine the expression for the force acting per unit length of the wires. Define 1A current from It.

The distance between two long and parallel wires is b. If the current flowing through each of them is iA, what will be the force acting per unit length of each wire?

Two long and straight parallel wires are carrying current 1 A each. If the distance between the two wires be 1 m, what will be force acting per unit length on them?

Two straight parallel wires are carying current I and they are r apart. What will be the force on one due to the other per unit length?

10 A current is passing through each of two long straight parallel wires. What should be the distance between the two wires (in cm) so that 0.4 dyn force acts per cm length of each wire? [mu_(0)=4pixx10^(-7)H.m^(-1)]

Two long straight parallel conducts carrying steady currents I_(1) and I_(2) are separated by a distance d. Explain briefly with the help of suitable diagram, how the magnetic field due to one conductor acts on the other. Hence deduce the expression for the force acting between the two conductors. Mention the nature of this force.

An electric current is flowing in a circular wire of radius a. At what distance from the centre on the axis of the circular wire will the magnetic field be 1/8th of its value at the centre?

Current I is flowing through a vertical long wire in the upward direction. The magnetic field at a point on the east of the wire is

Equal currents passing through two infinitely long parallel wires. Would there be any magnetic field midway between the wires, if the currents are (i) in the same direction, (ii) in opposite directions?