As Shown in the Figure,a Straight Wire Carries a Steady

As shown in the figure,a straight wire carries a steady current I.A metal bar is in contact with a pair of rails and is in upward motion with velocity of magnitude ν.The polarity of the induced emf in terminals X and Y is

A) X and Y are at the same potential.
B) X is positive and Y is negative.
C) Y is positive and X is negative.

Correct Answer:

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