試題詳解

55. An AC generator consists of 6 turns of a wire. Each turn has an area of 0.040 m² . The loop rotates in a uniform field (B = 0.20 T) at a constant frequency of 50 Hz. What is the maximum induced emf?
(A) 2.4 V
(B) 3.0 V
(C) 4.8 V
(D) 13 V
(E) 15 V