2011 AP Physics C物理C—Electricity and Magnetism電磁真題系列之簡答題免費下載

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2011 AP Physics C Electricity&Magnetism?Free-Response Questions Free Download

2011 AP 物理C電磁簡答題部分免費下載

此套題僅?p II含有簡答題，

共計時45分鐘，共3題

占總分50%

每道大題可能含有不同數量的小題

可以使用計算器

部分真題預覽：

1）A nonconducting, thin, spherical shell has a uniform surface charge density s on its outside surface and no charge anywhere else inside.

1. Use Gauss’s law to prove that the electric field inside the shell is zero everywhere. Describe the Gaussian surface that you use.
2. The charges are now redistributed so that the surface charge density is no longer uniform. Is the electric field still zero everywhere inside the shell?
   ____ Yes ____ No ____ It cannot be determined from the information given.
   Justify your answer.
   Now consider a small conducting sphere with charge +Q whose center is at corner A of a cubical surface, as shown below.
3. For which faces of the surface, if any, is the electric flux through that face equal to zero?
   ____ ABCD ____ CDEF ____ EFGH ____ ABGH ____ BCFG ____ ADEH
   Explain your reasoning.
4. At which corner(s) of the surface does the electric field have the least magnitude?
5. Determine the electric field strength at the position(s) you have indicated in part (d) in terms of Q, L, and fundamental constants, as appropriate.
6. Given that one-eighth of the sphere at point A is inside the surface, calculate the electric flux through face CDEF.

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