Electric Potential A horizontal sheet of negative charge has a uniform electric

Question

Electric Potential A horizontal sheet of negative charge has a uniform electric field E-2300N/C. Calculate the potential energy of a +4.2uC charge sitting 1.3m above the surface. 6- 7. Calculate the potential energy of a +1.0uC point charge sitting 0.1m from a -5.0uC point charge. A horizontal sheet of negative charge has a uniform electric field E Calculate the electric potential at a point 0.7m above the surface. 3000N 9. Calculate the electric potential 0.1m from a -3.8uC point charge. 10. A uniform field E 120N/C points in the +x direction. a) Calculate the potential difference from point x 2.0m to x 4.2m. b) Calculate the potential difference from x 4.2m to x-3.1m.

Explanation / Answer

Q6.

field due to the negative charge surface is directed towards the surface.

potential energy of the charge=potential at the point 1.3 above the surface*charge

=-(integration of E.dl)*charge

where dl=infinitesimal length vector

so potential energy=-electric field*distance*charge

=-2300*4.2*10^(-6)*1.3

=-0.012558 J

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