How to two wires carrying current cant attract each other describe by using flemings left hand rule?
Answers
Whenever current flows, it creates magnetic field around the wire which can be obtained by right hand thumb rule. Magnetic field can be expressed in terms of lines of force. These lines of force are like rubber bands. They try to contract if stretched. If pushed against one another, they tend to shove each other away.
Now lets look at the pictures of what happens under two scenarios with a single line of force:
In case 1 lines of force have cancelled in middle region, which now gives a semblance of stretched rubber bands wrapped around wires, these rubber bands push the two wires together. Here you experience attractive force.
In case 2: lines of force have added up in common region, it is like a lot of elastic material being crammed up in very little space, hence these lines of force now tend to push each other away.Hence here you experience a repulsive force.
This can also be explained through special theory of relativity and Lorentz Contractions, but that would unnecessarily complicate things. If you are well versed with special theory of relativity I would be happy to edit my answer and explain that approach as well.