MHT CET202311 May 2023Evening ShiftPhysicsMagnetic Effects of CurrentActual
Two long conductors separated by a distance 'd' carry currents I₁ and I₂ in the same direction. They exert a force ' F ' on each other. Now the current in one of them is increased to two times and its direction is reversed. The distance between them is also increased to 3 ~d . The new value of force between them is
Options
- A-2 ~F
- BF 3
- C-2 ~F 3
- D- F 3
Correct answer
C. -2 ~F 3
Step-by-step solution
The force per unit length of the conductors is given as: F = ₄ I ₁ I ₂ 2 d When the value and direction of current in the first conductor and the distance between the conductors are changed, aligned F ₂ & = - ₀ 2 I ₁ I ₂ 2 3 ~d & F ₂ ~F = -2 3 ~F ₂ & =- 2 ~F 3 aligned