ELECTROMAGNETICS

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ELECTROMAGNETICS

• Linear Charges
• Surface Charges
• Ring Charges
• Volume Charges

Professor Viviana Vladutescu
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LINEAR CHARGES
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An infinite length line of charge, ?L, is placed
along the z-axis. We wish to find E at an
arbitrary point P(?, ?, z).
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Redrawn problem in the r z plane with field
components for a charge element dQ as indicated.
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Adding the field components for a second charge
element dQ above the radial axis
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Sketch to show where all the components come from
to set up the integral.
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Surface Charges
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The point P is shown h above a current sheet of
infinite extent occupying the x y plane..
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Infinite sheet of charge broken up into a
continuous series of lines of charge.
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Ring Charges
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E is sought at point h on the z-axis from a ring
of charge centered on the x y plane.
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dE components from a pair of charge segments dL
on opposite sides of the ring.
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Terms for setting up the integral.
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