An 0.80-m conducting rod is dropped from rest from a bridge 25.0 m above the surface...
An 0.80-m conducting rod is dropped from rest from a bridge 25.0 m above the surface below. As it falls, it remains parallel to the ground and its length remains along the east-west direction. Just before the rod hits the ground below, the induced emf across its length is 6.5×10-4 V. Assuming the earth’s magnetic field at this location points due north.
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a) Determine the magnitude of the earth’s magnetic field at this location (just above the ground).
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b) Which end of the rod, east or west, is positively charged?
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