A point charge has a charge of 2.50×10 11 C . Part A At what distance from the p

Question

A point charge has a charge of 2.50×1011 C .

Part A

At what distance from the point charge is the electric potential 84.0 V ? Take the potential to be zero at an infinite distance from the charge.

d = ___ m

Part B

At what distance from the point charge is the electric potential 25.0 V ? Take the potential to be zero at an infinite distance from the charge.

d = ___ m

Please LOOK HERE, someone already tried and gave me the wrong answers, so please dont repeat the same wrong answer http://www.chegg.com/homework-help/questions-and-answers/point-charge-charge-250-10-11-c--part-distance-point-charge-electric-potential-840-v-take--q7787819

Explanation / Answer

A) Potentail due to point charge, V = k*Q/d

==> d = k*Q/V

= 9*10^9*2.5*10^-11/84

= 2.68*10^-3 m

B)

d = k*Q/V

= 9*10^9*2.5*10^-11/25

= 9*10^-3 m

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