A metal rod hangs suspended
from two supports as in the diagram shown. There is a constant
magnetic field present that is directed upward. We will use the
hanging wire to measure the strength of this magnetic field. Assume
that the wire has 28 A of current and that it is 2.3 meter long and
0.8 kg in mass. The wire is observed to be deflected from the
vertical by 38 degrees.
What is the magnetic field strength?
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