Questions
Question 1
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State Gauss's law for electric fields in integral form.
Question 2
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State Gauss's law for magnetism in integral form.
Question 3
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State Faraday's law in integral form.
Question 4
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State the Ampere-Maxwell law in integral form.
Question 5
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What does \(\nabla\cdot\vec E=\rho/\epsilon_0\) mean physically?
Question 6
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What does \(\nabla\cdot\vec B=0\) mean physically?
Question 7
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What does \(\nabla\times\vec E=-\partial\vec B/\partial t\) describe?
Question 8
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What does \(\nabla\times\vec B=\mu_0\vec J+\mu_0\epsilon_0\partial\vec E/\partial t\) describe?
Question 9
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Which Maxwell equation explains why there are no isolated north or south magnetic poles in the classical theory?
Question 10
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Which Maxwell equation must be used to find the emf around a loop when the magnetic flux changes?
Question 11
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In electrostatics, which Maxwell equations simplify and why?
Question 12
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In magnetostatics, what does the Ampere-Maxwell law reduce to?
Question 13
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Use Maxwell's equations to identify the speed of electromagnetic waves in vacuum.
Question 14
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Calculate \(1/\sqrt{\mu_0\epsilon_0}\) using \(\mu_0=4\pi\times10^{-7}\,\mathrm{N\,A^{-2}}\) and \(\epsilon_0=8.85\times10^{-12}\,\mathrm{F\,m^{-1}}\).
Question 15
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What happens to Maxwell's equations in a charge-free, current-free vacuum region?
Question 16
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How does Maxwell's displacement-current term support charge conservation?
Question 17
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A closed surface encloses \(+3.0\,\mu\mathrm{C}\). What is the electric flux through the surface?
Question 18
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A closed surface has \(0.020\,\mathrm{Wb}\) of magnetic flux entering it. How much magnetic flux must leave it?
Question 19
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Which pair of Maxwell equations shows how time-varying fields can sustain an electromagnetic wave?
Question 20
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Why are Maxwell's equations often described as a unified theory of electricity, magnetism, and light?