Lec15-3-LPN

# Lec15-3-LPN - ture 15-1 ture Sources of Magnetic Fields...

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cture 15- cture 15- 1 Sources of Magnetic Fields Permeability constant Moving point charge: Bits of current: I Biot-Savart Law The magnetic field “circulates” around the wire. http://falstad.com/vector3dm/

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cture 15- cture 15- 2 Magnetic field due to a current loop Principle of superposition: At the center , On axis generally,
cture 15- cture 15- 3 Magnetic Field At Center of Circular Arc Current I runs clockwise in the closed loop wires below: What is B at center?

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cture 15- cture 15- 4 Circular Loop Current as a Magnetic Dipole if |x|>>R On electric dipole axis
cture 15- cture 15- 5 Gauss’s Law for Magnetism sources No sources Gauss’s Law Gauss’s Law for Magnetism

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cture 15- 6 Magnetic field of a solenoid A constant magnetic field could be produced by an infinite sheet of current. In practice, however, it is easier and more convenient to use a solenoid . A solenoid is defined by a current I flowing through a wire that is wrapped n turns per unit length on a cylinder of radius R and length L . L
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Lec15-3-LPN - ture 15-1 ture Sources of Magnetic Fields...

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