Magnetic Field Due to Straight Current Carrying Conductor
Two thin,long...
Question
Two thin,long,parallel wires,seperated by a distance 'd' carry a current of 'i'A in the same direction.They will :
A
Attract each other
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B
Repel,each other
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C
Depend upon the material of wire
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D
Can't say
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Solution
The correct option is A Attract each other Answer is A. We consider two long straight parallel wires separated by a distance d carrying currents I1 and I2 . Let us examine the case where the two currents are in the same direction, as in Figure given below. Wire 2 will experience a magnetic field of due to wire 1 in the direction indicated, and hence will experience a force. The direction of F2 indicated shows that wire 2 will be attracted towards wire 1. In a similar manner, we can show that wire 1 will experience a force due to the magnetic field B2 of wire 2, and that this force F1 will have a magnitude equal to that of F2 but opposite in direction. Thus, wire 1 will be attracted towards wire 2.