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The figure below shows a section of an overhead power line that is 56.5 m
long and carries a current of 2.15 kA. The current is directed to the north.
The magnitude of the Earth's magnetic field at this location is 5.50 × 10-5 T.
The field has a northward component and a downward component, so that it
makes an angle of 65.0° with the power line.
65.0°
(a) What is the magnitude of the magnetic force (in N) on the power line?
5.6

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