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(a) Determine the electrostatic potenti...

(a) Determine the electrostatic potential energy of a system consisting of two charge `7 muC and -2 muC` (and with no external field) placed at `(-9 cm, 0,0) and (9 cm, 0,0)` respectively.
(b) How much work is required to seperate the two charges infinitely away from each other ?
(c) Suppose that the same system of charges is now placed in an external electric field `E = A xx 1//r^(2)`, where `A = 9xx10^(5) C m^(-2)`.
What would the electrostatic energy of the configuration be ?

A

0.7 J

B

`-0.7J`

C

70 J

D

`-70J`

Text Solution

Verified by Experts

The correct Answer is:
C
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