NEET2022PhysicsMagnetic Effects of CurrentActual
Two very long, straight, parallel conductors A and B carry current of 5 ~A and 10 ~A respectively and are at a distance of 10 ~cm from each other. The direction of current in two conductors is same. The force acting per unit length between two conductors is ( ₀=4 10⁻⁷ . SI unit):
Options
- A2 10⁻⁴ Nm ⁻¹ and is attractive
- B2 10⁻⁴ Nm ⁻¹ and is repulsive
- C1 10⁻⁴ Nm ⁻¹ and is attractive
- D1 10⁻⁴ Nm ⁻¹ and is repulsive
Correct answer
C. 1 10⁻⁴ Nm ⁻¹ and is attractive
Step-by-step solution
As per question, aligned F l & = _ o 4 2 I ₁ I ₂ r & = 4 10⁻⁷ 2 5 10 2 0.1 & =10⁻⁴ Nm ⁻¹ aligned The nature of the force is attractive. (where, the symbols have their usual meanings)