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填空题 Microwave oven uses electromagnetic wave to heat food. Suppose the space inside the oven can be treated as free space. If the electric field at point P in the oven is measured to be E=6×106 V/m, then the magnetic field at point P at the same moment is B=_________T
学科：Physical Modelling A
时间：2023-06-05 08:10:54
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Uniform magnetic field in cylindrical space changes as dB/dt = C > 0. If a straight wire and a curved wire are both placed in the changing field as shown in the figure, which one has a greater EMF in it? <img src="https://p.ananas.chaoxing.com/star3/origin/2c8d12f2f499bc31391be1dc96904cac.png">A. The straight wireB. All the 3 cases are possibleC. they have equal EMFD. the curved wire
题目2单选题
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题目3单选题
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