Answer & explanation
Correct answer: option 1
$\text{Force per unit length of parallel wire is F} = \frac{\mu_0 I^2}{2\pi d}$
$\text{Since currents are parallel so force is attractive.}$
Correct answer: option 1
$\text{Force per unit length of parallel wire is F} = \frac{\mu_0 I^2}{2\pi d}$
$\text{Since currents are parallel so force is attractive.}$