Two long, straight, parallel conductors are 25 cm apart in air. Conductor A carries a…
PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
Two long, straight, parallel conductors are 25 cm apart in air. Conductor A carries a steady current of 4.0 A due north. Conductor B carries a steady current of 6.0 A in the same direction as conductor A. The length of each conductor that you may treat as interacting is effectively infinite for the purpose of this problem.
(a) Calculate the magnitude of the magnetic field at the location of conductor B due solely to the current in conductor A. Express your answer with appropriate units.
(b) Determine the magnitude and direction of the magnetic force per unit length exerted on conductor B by conductor A. Clearly indicate whether the force on B is toward or away from conductor A.
(c) State the magnitude and direction of the magnetic force per unit length on conductor A due to conductor B, and briefly explain how your answer is consistent with a fundamental law of physics.