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

2013 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 very long, solid, nonconducting cylinder of radius R has a positive charge of uniform volume density r .
A p of the cylinder far from its ends is shown in the diagram above. Let r represent the radial distance from the axis of the cylinder. Express all answers in terms of r, R, r , and fundamental constants, as appropriate.

Using Gauss’s law, derive an expression for the magnitude of the electric field at a radius r < R. Draw an appropriate Gaussian surface on the diagram.
Using Gauss’s law, derive an expression for the magnitude of the electric field at a radius r > R.

On the axes below, sketch the graph of electric field E as a function of radial distance r for r = 0 to r = 2R. Explicitly label any intercepts, asymptotes, maxima, or minima with numerical values or algebraic expressions, as appropriate. Derive an expression for the magnitude of the potential difference between r = 0 and r = R .
Is the potential higher at r = 0 or r = R ?
____ r = 0 ____ r = R

The nonconducting cylinder is replaced with a conducting cylinder of the same shape and same linear charge density. On the axes below, sketch the electric field E as a function of r for r = 0 to r = 2R. Explicitly label any intercepts, asymptotes, maxima, or minima with numerical values or algebraic expressions, as appropriate.