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課程名稱︰普通物理學甲(下)
課程性質︰大一必修
課程教師︰黃暉理
開課學院：生農學院
開課系所︰生機系
考試日期（年月日）︰97/11/12
考試時限（分鐘）：50分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.Find an expression for the oscillation frequency of an electric dipole of
dipole moment P and rotational inertia I for small amplitude of oscillation
about its equilibrium position in the uniform electric field of magnitude E.
2.A small circular hole of radius R=2.40 cm has been cut in the middle
of the infinite, flat, nonconducting surface that has uniform charge density
σ=6.00 pC/m^2. A z axis , with its origin at the hole's center , is
perpendicular to the surface .In unit-vector notation ,what is the electric
fied at point P at Z=3.40 cm ?
3 The smiling face consist of three items :
(a) A thin rod of charge -5.0μC that forms a full circle of radius 10.0 cm.
(b) A second thin rod of charge 4.0μC that forms a circular arc of radius
6.0 cm, subtending an angle of 90° about the center of the full circle.
(c) An electric dipole with a dipole moment that is perpendicular to
a radial line and has magnitude 1.28 x 10^-21 C‧m
What is the net electric potential at the center?
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