Question

The charge on a point charge is 2.50 x 10-11C. Where we placed the point charge for get electric potential 90 V and 30 V? Take the value of electric potential is zero at an infinite point from the charge point.

Answer 1

Answer:

V=kq/r

r=kq/V

 $r_{1}$=9*$10^{9}$*2.5*$10^{-11}$/90 =0.25*$10^{-2}$ m

 $r_{2}$=9*$10^{9}$*2.5*$10^{-11}$/30 =0.75*$10^{-2}$ m

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