Electric Field - Ch 26 Electric Field Electric Field Model...

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Ch – 26 Electric Field
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Electric Field Model One or more charges (source charges) alter the space around them by creating an electric field, E . A separate charge (test charge or probe) experiences a force F , exerted by the field. F = q E
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Electric Field of a Point Charge The unit vector points outward from the source charge If q is negative the vector is reversed and points inward, toward the source charge
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Electric Field Simulation
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Electric field of a dipole Two equal and opposite charges small distance apart Zero net charge but it causes an E field Dipole moment: p = qs, pointing from negative to positive
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Electric Field of a Dipole
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E Field for an Infinite line of Charge
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Picturing the Electric Field
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Electric Field of a Dipole
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E Field for an Infinite line of Charge
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Electric Field of a Ring of Charge (E ring ) z = [1/(4πε 0 )] [zQ/(z 2 +R 2 ) 3/2 ]
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Electric Field of Charged Disk Limit as R Note that this value of E does not depend on the distance from the charged plane (z), only on the surface charge density
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Electric field strength of an infinitely charged plane is independent of distance from the charge
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Parallel Plate Capacitor A parallel plate capacitor provides a uniform electric field.
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Electric Field - Ch 26 Electric Field Electric Field Model...

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