Science 30 January 1999 Grade 12 Diploma Examination

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Use the following information to answer the next question.Induction of a CurrentMagnetDirectionINSDirectionII39. Which of the following statements describes induction as depicted by the apparatusshown above?A. When the magnet is held stationary, only direct current flows in the wire.B. When the magnet is held stationary, only alternating current flows in the wire.C. When the magnet moves in direction I, electrons flow in the wire in the samedirection as they do when the magnet moves in direction II.D. When the magnet moves in direction I, electrons flow in the wire in theopposite direction as they do when the magnet moves in direction II.Numerical Response<strong>12</strong>. To conduct an experiment aboard a space station, 24.0 V from a solar panel istransformed to 480 V. If the transformer’s secondary coil has 10 000 turns of wire,the primary coil has __________ turns.(Record your answer to three digits in the numerical-response section on the answer sheet.)28
40. A technician on a space station wished to build a circuit using three identicalresistors such that the circuit would have the least total resistance. Which of thefollowing circuits would have the ammeter with the highest reading?A. B.AAC. D.AA29
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Page 18 and 19: 24. The use of pesticides may pose
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Science 30 January 1999 Grade 12 Diploma Examination

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