MagnetismHard
Question
Two long conductors, separated by a distance d carry current I1 and I2 in the same direction. They exert a force F on each other. Now the current in one of them increased to two times and its direction reversed. The distance is also increased to 3d. The new value of the force between them is
Options
A.- 2F
B.F/3
C.- 2F/3
D.- F/3
Solution
Force between two long conductor carrying current

According to question

From equation (i) and (ii), F′ = -
F.

According to question

From equation (i) and (ii), F′ = -
F.Create a free account to view solution
View Solution FreeMore Magnetism Questions
The magnetic field due to a straight conductor of uniform cross-section of radius a and carrying a steady current is rep...Which of the following conclusion can be drawn from the result...All straight wires are very long. Both AB and CD are arcs of the same circle, both sub tending right angles at the centr...A conducting circular loop of radius r carries a constant current i. It is placed in a uniform magnetic field such that ...A rectangular loop carrying a current i is situated near a long straight wire such that the wire is parallel to one of t...