A point charge has a charge of 2.50 X 10-11 C. At what distance from the point
charge is the electric potential a) 90.0 V? b) 30.0 V? Take the potential to be
zero at an infinite distance from the charge.
Note: Show your free body diagram (FBD) and solutions accurately,
systematically and orderly with the standard unit, and express it into
prefix word if possible.
Potential due to a point charge is given by
where k=
let's deduce a equation of V in terms of r :
a) when V = 90 volts
b) when V = 30 volts
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