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

question 27

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 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.