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A horizontal power line carries a current of 5830 A from south to north. Earth's magnetic...

A horizontal power line carries a current of 5830 A from south to north. Earth's magnetic field (85.2 µT) is directed toward the north and is inclined downward at 72.0° to the horizontal. Find the (a) magnitude and (b) direction of the magnetic force on 120 m of the line due to Earth's field.

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