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34. The diagram shows in cross-section a circular loop of wire which rotates at a steady rate about a diameter 0 which is perpendicular to a uniform B field. The maximum induced emf occurs when the point X on the loop passes:
 
(A) a
(B) b
(C) c
(D) d


答案:C
難度: 非常困難

34. The diagram shows in cross-section a..-阿摩線上測驗