A thin, horizontal 11 c m A thin, horizontal 11cm x 11cm copper plate is charged

Question

A thin, horizontal 11cm

A thin, horizontal 11cm x 11cm copper plate is charged with 1.0 x 1010 electrons. Consider the electrons are uniformly distributed on the surface. Part A What is the strength of the electric field 0.1 mm above the center of the top surface of the plate? Express your answer using two significant figures. Part B What is the direction of the electric field 0.1 mm above the center of the top surface of the plate? Part C What is the strength of the electric field at the plate's center of mass? Part D What is the strength of the electric field 0.1 mm below the center of the bottom surface of the plate? Express your answer using two significant figures. Part E What is the direction of the electric field 0.1 mm below the center of the bottom surface of the plate?

Explanation / Answer

q = e * 10^10 = - 1.6 *10^-9 C

sigma = q/A = 1/32* 10^-7 C/m^2

A) E = sigma/2epsilon = - 7470.7 N/C

B) Towards the plate

C) Zero

D) 7470.7 N/C

E ) Towards the plate

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