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lect5412 - Source of Magnetism Electric current produces a...

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Source of Magnetism
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Electric current produces a magnetic field!!!
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Direction of Magnetic Field Produced by a Current-Carrying Wire: Right-Hand Rule
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Grasp the wire with your right hand so that your thumb points in the direction of the conventional (positive) current; then your fingers will encircle the wire in the direction of the magnetic field.
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Force on an Electric Current in a Magnetic Field.
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Important: the direction of the force is always perpendicular to the direction of the current and also perpendicular to the direction of the magnetic field.
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Another Right-Hand Rule (for the Force)
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Force on Electric Current in a Magnetic Field Maximum F=IlB
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Units of Magnetic Field 1 Tesla (T) = 1 N/A m 1 Gauss (G) = 10 -4 T
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Force on an Electric Charge Moving in a Magnetic Field
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Maximum F=qvB
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Right-Hand Rule Again
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Important: right-hand rule defines direction of a force acting on a positive charge. For negatively charged particles the force is in exactly the opposite direction.
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