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

question 80

Multiple Choice

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 $v$ . The polarity of the induced emf in terminals $X$ and $Y$ is

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

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