A thin, horizontal 17cm BY 17cm copper plate is charged with 1.810^10 electrons.

Question

A thin, horizontal 17cm BY 17cm copper plate is charged with 1.810^10 electrons. Consider the electrons are uniformly distributed on the surface. A) What is the strength of the electric field 0.1mm above the center of the top surface of the plate? B) What is the direction of the electric field 0.1mm above the center of the top surface of the plate? AWAY FROM THE PLATE OR TOWARDS THE PLATE?? C) What is the strength of the electric field 0.1mm below the center of the bottom surface of the plate? D) What is the direction of the electric field 0.1mm below the center of the bottom surface of the plate? AWAY FROM THE PLATE OR TOWARDS THE PLATE??

Explanation / Answer

the formula is

0.5n*1.6*1000/L2*8.85

= 0.5*1.6*10^10 *1000/0.17^2 *8.85

=3127X 10^10

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