Motional Emf: As shown in the figure, a metal bar is in contact with a pair of metal parallel rails. A steady uniform magnetic field B, perpendicular to the plane of the rails and pointing outward from the page, is present. The bar is in downward motion with velocity of magnitude ?. The direction of the induced current through the resistor R is
A. from a to b.
B. from b to a.
C. No current is induced.
Answer: A
Physics & Space Science
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A wave with a period of .01 seconds has a frequency of ________ Hz
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Physics & Space Science
Current: What current is flowing in a resistor if 4.0 × 1016 electrons pass a point in the resistor in 0.50 s? (e = 1.60 × 10-19 C)
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Physics & Space Science