Two long conductors, separated by a distance d carry currents I 1 and I 2 in the same direction. They exert a force F on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance is also increased to 3d. The new value of the force between them is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Force between two conductors, 
When I 1 is changed to 2I 1 and 
is changed to 3d.
As, direction of current is reversed, so 
.
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