Figure below shows two infinitely long and thin current carrying conductors X and Y kept in vacuum, parallel to each other, at a distance .a..

(i) How much force per unit length acts on the conductor y due to the current flowing through X ? Write your answer in terms of `((mu0)/(4pi)),I_(1),I_(2)` and a.
(Derivation of formula is not required.),
(ii) Define ampere, in terms of force between two current carrying conductors.

Explanation

Apply the relation `(F)/(l)=(mu_(0))/(4pi)(2I_(1)I_(2))/(a)`.