Two conductor are parallel and  have same direction of flow of current .what will be the force between them repulsion or attraction. And why ,explain

Asked by Dileep | 29th Sep, 2015, 10:20: AM

Expert Answer:

The current through both the conductors is in the same direction.
 
Hence, using the right-hand thumb rule, the direction of magnetic field will be as shown in the figure below.
 
 
Now, Fleming's left - hand rule gives the direction of force by keeping the index finger in the direction of field, the middle finger in the direction of current and the thumb will point in the direction of force on the conductor.
 
Therefore, on the left conductor:
 
Out: Force is in the right direction
 
In: Force is in the left direction
 
And, on the right conductor:
 
Out: Force is in the right direction
 
In: Force is in the left direction
 
Now, the far points on the conductor do not have large effect. So, the points inside the conductor overpower the points outside.
 

 
Hence, the two conductors will repel each other.


Answered by Romal Bhansali | 29th Sep, 2015, 11:11: AM