As Shown in the Figure, a Metal Bar Is in Contact

question 33

Multiple Choice

As shown in the figure, a metal bar is in contact with a pair of parallel rails. A steady, uniform, magnetic field $B$ is present directed to the right. The bar is moving upward with velocity of magnitude $v$ . What is the polarity of the induced emf in terminals $X$ and $Y$ ?

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

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