Magnetism (part 3)

# Magnetism (part 3) - The Magnetic Field of a Current F = qE...

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Magnetism The Magnetic Field of a Current x x x x x x x x x x x x x x x x x x v F B q → → → → → → → → → → v F B q × ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ ↑ v F = 0 B q B v q E q F × + =

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Physics 113 Dr. Renat Letfullin 2 TheMagnetic Field of a Current Examples : 1. The Magnetic Field of a Long Straight Wire 2. The Magnetic Field near a Heater Wire 3. The Magnetic Field of a Current Loop 4. Matching the Earth’s Magnetic Field Loops as Magnetic Dipoles TheMagnetic DipoleMoment 1. Example : TheField of a Magnetic Dipole LineIntegrals Ampere’s Law 1. Example : TheMagnetic Field Insidea Current-Carrying Wire Magnetic Field of Solenoids Today.. .
Physics 113 Dr. Renat Letfullin 3 Last Time: The Cross Product Form of the Biot-Savart Law ( 29 0 2 ˆ 4 q v r B r μ π × = The Biot-Savart Law can be represented more compactly using a vector cross product. This automatically gives a B field that is perpendicular to the plane of the charge velocity and radius vector to the point at which the field is being evaluated.

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