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

question 60

Multiple Choice

As shown in the figure, a metal bar is in contact with a pair of metal parallel rails. A steady uniform magnetic field B, perpendicular to the plane of the rails and pointing outward from the page, is present. The bar is in downward motion with velocity of magnitude ν. The direction of the induced current through the resistor R is

• A) from a to b.
• B) from b to a.
• C) No current is induced.

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Subject-Verb Agreement

The grammatical rule that the verb in a sentence must agree in number with the subject (singular or plural).

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