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Consider a circular disk with radius R that has a uniformly distributed surface charge of Q.
(a) Calculate the electric potential (Phi) at various points along the central axis of this disk.
(b) Use the result of part (a) to determine the electric field at points along the axis.
(c) Show that your results for both parts reduce to the appropriate formula in the limit that R tends to infinity.© BrainMass Inc. brainmass.com October 25, 2018, 3:13 am ad1c9bdddf
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Negative Charge on Circular Disk
A thin circular disk with a circular hole at its center (called an annulus) has inner radius R1 and outer radius R2. The disk has a uniform positive surface charge density σ on its surface. i) Determine the total electric charge on the annulus. ii) If the annulus lies in the y-z plane with its center at the origin find the magnitude and direction of the electric field along the x-axis. Consider points both above and below the annulus. iii) What would happen to a negative charge if it was allowed to move only along the x-axis and was placed at x = 0.01R1?View Full Posting Details