2013 AP Physics C物理C—Electricity and Magnetism电磁真题系列之Practice Exam简答题免费下载

历年AP Physics物理学系列

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2013 AP Physics C Electricity&Magnetism Practice Exam Free-Response Questions Free Download

2013 AP 物理C电磁模考简答题部分免费下载

此套题仅 p II含有简答题，

共计时45分钟，共3题

占总分50%

每道大题可能含有不同数量的小题

可以使用计算器

部分真题预览：

1）Students are given the circuit above in their lab, but they do not know the values of the two resistances R_A and R_B. The battery has a terminal voltage of 24 V and the inductor has an inductance of 0.05 H. Assume the internal resistance of both the battery and the inductor to be negligible. The switch S is closed at time t = 0.
In order to determine the values of the resistances R_A and R_B, the students measure the current as a function of time through the resistance R_A. The graph of their results is below.

On the circuit diagram above, insert an ammeter to measure the current through R_A.

Use the data taken by the students to calculate the value of R_A.

Use the data taken by the students to calculate the value of R_B.

Calculate the initial rate of change of current in the inductor.

In reality, both the battery and the inductor have nonnegligible internal resistance. Would the true value of R_A be greater than or less than the value you obtained in part (b)?
_______Greater than_______Less than
Justify your answer.