Two long conductors, separated by a distance d carry current 
 and 
 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 directions is reversed. The distance is also increased to 3 d. The new value of the force between them is
Two long conductors, separated by a distance d carry current and 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 directions is reversed. The distance is also increased to 3 d. The new value of the force between them is
Option 1 -
-2F
Option 2 -
F/3
Option 3 -
2F/3
Option 4 -
-F/3
- 
1 Answer
- 
Correct Option - 3
 
 
 Detailed Solution:Since one of the current increase two times and distance increases three times, so force become 
Similar Questions for you
The exact formula for the magnetic force per unit length between two parallel current-carrying conductors:
For more information, check: Force between parallel conductors
Kindly go through the solution
F = iL B sinq
= × 1 × 3 × 10–5 sin90
= 3 × 10–5 N
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