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Two charges 14 muC and -4 muC are placed...

Two charges `14 muC` and `-4 muC` are placed at (-12 cm, 0, 0) and (12 cm, 0, 0) in an external electric field `E = (B/r^2)` , where `B = 1.2 xx 10^6 N//(cm^2)` and r is in metres. The electrostatic potential energy of the configuration is

A

97.9 J

B

102.1 J

C

2.1 J

D

`-97.9 J`

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