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

question 136

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.