- #1

adamaero

- 109

- 1

- Homework Statement
- Two infinitely long parallel wires separated by 1 m are at 6 m above ground. Each carries a 60-Hz AC current of 100 amperes (rms), but in opposing directions. Find the magnetic flux density B at a test location on the ground which is at an equal distance from the wires.

- Relevant Equations
- B = u*i/(2*pi*R)

I got 4.7*sin(377t) micro-Tesla for each wire, but where are they getting the total B-field equaling 0.78 micro-Tesla?

Is it some hidden trigonometry?