1) A charged sphere is orbited by an electron at a constant distance. What poten

Question

1) A charged sphere is orbited by an electron at a constant distance. What potential difference does the electron experience?

2) The earth has an electrical potential that falls off with altitude. If it falls off approximately uniformly near the earth's surface, how is its potential difference between 20 m and the ground related to the potential differences between 20 m and 10 m, and between 10 m and the gorund?

3) An electrical field is in the positive i direction. Which way would an electron move in this electric field?

4) Draw the electric field lines and the equipotential lines for 2 parallel charged plates of opposite sign.

Explanation / Answer

a) as long as the distance of electron from the charged sphere doesnt change there is no change in potential


b)V20,V10,Vg are related near the ground as V20-Vg=(V20-V10)+(V10-Vg)


c) electric field in +ve i direction indicates that electron will move in the opposite direction to the electric field ie -ve i direction



d) lines in green are the electric fields and lines in violet are equipotential surfaces

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