A physics student is investigating how changes to experimental conditions affect the…
PHYSICS · Multi-part · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
A physics student is investigating how changes to experimental conditions affect the magnetic interaction between two long, parallel conductors separated by a fixed distance. Initially the conductors carry steady currents I1 and I2 in the same direction, so the magnitude of the attractive magnetic force per unit length is F0. The student considers three separate modifications, each applied individually while all other quantities remain unchanged:
(a) For each modification, state qualitatively whether the magnitude of the force per unit length increases, decreases, or stays the same compared with F0. Provide a brief explanation for each case.
(b) For any one of the three modifications, describe verbally how you could adjust the other experimental parameters (current or separation) to restore the force per unit length to its original value F0. Justify your proposal.