NEET2016PhysicsMagnetic Effects of CurrentActual
A square loop ABCD carrying a current i , is placed near and coplanar with a long straight conductor XY carrying a current I , the net force on the loop will be:
Options
- A2 μ 0 I i 3 π
- Bμ 0 I i 2 π
- C2 μ 0 I i L 3 π
- Dμ 0 I i L 2 π
Correct answer
A. 2 μ 0 I i 3 π
Step-by-step solution
F 1 = μ 0 I i L 2 π L 2   = μ 0 I i π   F 2 = μ 0 I i L 2 π 3 L 2 = μ 0 I i 3 π ∴ F n e t = F 1 - F 2 F n e t = 2 3 μ 0 I i π