FULL SCREEN PRINTER VERSION BACK NEXT Chapter 23, Problem 037 Your answer is par

Question

FULL SCREEN PRINTER VERSION BACK NEXT Chapter 23, Problem 037 Your answer is partially correct. Try again. A square metal plate of edge length 7.2 cm and neglig ble thickness has a total charge of 7.3 x 10 C. (a) Estimate the magnitude E of the electric flield just off the center of the plate (at, say, a distance of 0.69 mm from the center) by assuming that the charge is spread uniformly over the two faces of the plate. (b) Estimate E at a distance of 33 m (large relative to the plate size) by assuming that the plate is a charged particle. 8.41e-17 T N/C or V/m Units [ N/C or V/m

Explanation / Answer

a) E = charge density / 2 e0

charge density = (7.3 * 10-6) / (7.2 * 10-2)2 = 1.41 * 10-3

E = (1.41 * 10-3 ) / (2 * 8.85 * 10-12)

E = 7.96 * 107 N/C

b) E = (9 * 109 * 7.3 * 10-6) / 332

E = 60.33 N/C

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