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?

The distance between two long straight conductors is 5m. Currents 2.5A and 5A are flowing through them in the same direction. What will be the magnetic field at the mid-point betwen them ?

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)]

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.

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?

If the force between the two parallel wires having carrying current, is F, then what will be the force if the current is doubled?

Two conductors are connected in parallel combination. The ratio of the currents flowing through them is 3:5. The ratio of their resistance is :

Two wires having resistances R and 2R are coneected in parallel . If current is allowed to pass through the combination , what will be ratio of power consumed in the two resistances ?

The radius of a copper wire is twice that of a steel wire. One end of the copper wire is joined with one end of the steel wire and the same tensile force is applied on them . If the length of the copper wire increases by 1% , what will be the percentage increase in the length of the steel wire? Given Young's modulus of steel is twice that of copper.