MHT CET 2025 Physics question
Two long conductors separated by a distance 'd' carry currents '' and '' in the same directions. They exert a force 'F' on each other. The distance between them is increased to '3d'. If new repulsive force of magnitude '' is found between these conductors, the required change in the magnitude and direction of one of the currents in the conductor is respectively [length of the conductors is constant]
Answer: (B)
Solution
Parallel currents in the same direction attract, with (attractive). At distance the force must be repulsive, so one current must be reversed, with magnitude . Then
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account