本题目来源于试卷: Electromagnetic Induction and Faraday’s Law and Lenz Law，类别为 美国物理杯赛(Physics Bowl)
[单选题]
15.50 A magnetic field dir mga 2h90tp ewjy; g78ar9mv hw3 (qwo:jwxx a8 5z0* oi+8enxlected into the plane of the page is decreasing in time. A constant emf ξ is produced for the square loop enclosing the field in the figure. The square loop has three identi 50x xla*8o ie+j8 wnzxcal light bulbs of resistance R in it and an ideal voltmeter connected to the corners through the center of the loop. What is the magnitude of the voltmeter’s reading?
A. 0
B. $\frac{1}{2}\xi$
C. $\frac{1}{3}\xi$
D. $\frac{1}{6}\xi$
E. $\frac{2}{3}\xi$
参考答案: D
本题详细解析:
暂无
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