MHT CET202312 May 2023Morning ShiftPhysicsMagnetic Effects of CurrentActual
A , B and C are three parallel conductors of equal lengths and carry currents I, I and 2I respectively as shown in figure. Distance A B and B C is same as ' d '. If ' F₁ ' is the force exerted by B on A and F ₂ is the force exerted by C on A , then
Options
- AF ₁= F ₂
- BF ₁=- F ₂
- CF ₁=2 ~F ₂
- DF ₁= 1 2 ~F ₂
Correct answer
B. F ₁=- F ₂
Step-by-step solution
Force per unit length exerted by B on A , F ₁= ₀( I )( I ) 2 d = ₀ I ^2 2 d (outside the plane of paper) Force per unit length exerted by C on A , F ₂= ₀( I )(2 I ) 2 (2 ~d ) = ₀ I ^2 2 d (Inside the plane of paper) F₁=-F₂