Electric Field

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
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
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
E Field for an Infinite line of Charge

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Picturing the Electric Field
Electric Field of a Dipole

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E Field for an Infinite line of Charge
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
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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