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

Options

A. attract each other with a force per unit length of `(mu_(0)i^(2))/((2pid^(2)))`
B. repel each other with a force per unit length of `(mu_(0)i^(2))/((2pid^(2)))`
C. attract each other with a force per unit length of `(mu_(0)i^(2))/((2pid))`
D. repel each other with a force per unit length of `(mu_(0)i^(2))/((2pid))`

Answer

C

Explanation

Force of attraction between wires `(mu_(i)^(2))/(2pid)` , per unit length