Two thin, long, parallel wires, separated by a distance 'd' carry a current of 'i' A in the same direction. They will

Options

A. Attract each other with a force of `mu_(0)i^(2)//(2pid^(2))`
B. Repel each other with a force of `mu_(0)i^(2)//(2pid^(2))`
C. Attract each other with a force of `mu_(0)i^(2)//(2pid)`
D. Repel each other with a force of `mu_(0)i^(2)//(2pid)`

Answer

C

Explanation

`((F)/(l))=(mu_(0))/(4pi).(2i_(1)i_(2))/(a)implies((F)/l)=(mu_(0))/(4pi).(2i^(2))/(d)=(mu_(0)i^(2))/(2pid)` (Attractive)