defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Moving Charges and Magnetism Magnetic Field
For two parallel wires, separation d carrying current \(I_a\) and \(I_b\) in the same direction will have the force on a length of L of either wire is
1
\(\frac{(\mu_0 \ LI_aI_b)}{\ 2\pi d} \ Repulsion\)
2
\(\frac{\mu_0 L I_a I_b}{\pi d} \ Attraction\)
3
\(\frac{(\mu_0 \ LI_aI_b)}{\ \pi d} \ Repulsion\)
4
\(\frac{\mu_0 L I_a I_b}{2\pi d} \ Attraction\)