In the diagram below, the infinite line and the hoop of radius 2.00 cm have resp
ID: 1497194 • Letter: I
Question
In the diagram below, the infinite line and the hoop of radius 2.00 cm have respective currents of Iline = 7.64 A and Ihoop = 1.78 A. The edge of the hoop can be adjusted to be a distance D away from the long wire. Find a D such that the magnetic field exactly in the middle of the hoop is zero. Ignore the thicknesses of the hoop and the wire.
In the previous question, if the wire is held in place as these currents ensue, describe all effects that are true for the hoop. It will:
(a) Experience a net force toward the wire
(b) Experience a net force away from the wire
(c) Experience a torque turning the left part of the wire out of the page
(d) Experience a torque turning the right part of the wire out of the page
(e) Experience a torque turning the top part of the wire out of the page
(f) Experience a torque turning the bottom part of the wire out of the page
Explanation / Answer
(b) Experience a net force away from the wire
net torque is Zero