Two thin long parallel wires separated by a distance Y are carrying a current I Amp each. The magnitude of the force per unit length exerted by one wire on their is ........................
Options:
(a) `(mu_oI^2)/Y^2`
(b) `(mu_oI^2)/(2piY)`
(c) `mu_o/(2' 'pi)1/Y`
(d) `mu_o/(2pi)1/Y^2`