29 - Magnetism II

# 29 - Magnetism II - Physics 212 Fall 2009 Magnetism II...

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Physics 212 Fall 2009 Magnetism II 11/04/09

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Maxwell’s Equations Which one of the following is not one of Maxwell’s fundamental equations of electromagnetism? a) Gauss’ law for electricity b) Coulomb’s law c) Faraday’s law d) Ampere-Maxwell law e) Gauss’ law for magnetism
Vector Integrals Faraday’s law may be written: E d s = d Φ B dt As with all of Maxwell’s equations given in the text, the symbol is used. What is the meaning of this symbol in Faraday’s Law? a) It is an integration that is performed when a current is present. b) It means that the dot product is to be performed first, before the other arithmetic operations. c) The integration is performed over an closed surface. d) The integration is performed using Riemannian geometry. e) The integration is performed around a closed loop.

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Maxwell’s Equations Gauss’ Law E d A = q enc ε 0 E d s = −Δ V B d A = 0 Faraday’s Law Ampere-Maxwell Law E d s = d Φ B dt B d s = μ 0 i + μ 0 ε 0 d Φ E dt
Magnetism Three types of response to magnetic field Diamagnetism - weak repulsion / material is normally non-magnetic Paramagnetism

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