A wire of a certain length is carrying a current of 2.0 A. It is placed at an angle of 60° with respect to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.40 N, what is the length of the wire?
A) 1.0 m
B) 1.2 m
C) 1.4 m
D) 1.6 m
E) 1.8 m

Question

Quizplus · Accepted Answer

The force on a current-carrying wire in a magnetic field is given by F = BIL sin(θ). Rearranging for L gives L = F / (BI sin(θ)). Substituting the given values: L = 0.40 N / (0.20 T * 2.0 A * sin(60°)) = 1.2 m.

A Wire of a Certain Length Is Carrying a Current