3. A metal rod is falling straight toward Africa near the equator. As it falls,
ID: 1372134 • Letter: 3
Question
3. A metal rod is falling straight toward Africa near the equator. As it falls, one end of the rod becomes positively charged due to a motional emf as the rod falls through the Earth?s magnetic field (see figure) *Note: Near the surface of the Earth at the equator, the magnetic field points up toward the north pole. The rod is oriented so that: A. the rod is horizontal with the positive end toward the east. B. the rod is horizontal with the positive end toward the north. C. the rod is vertical with the positive end higher. D. the rod is horizontal with the positive end toward the west. E. the rod is vertical with the positive end lower.
Explanation / Answer
D .the rod is horizontal wit hthe positive end towards the east
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