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A system consists of two charges 4 mu C ...

A system consists of two charges `4 mu C and -3 muC` with no external field placed at `(-5 cm, 0,0) and (0 cm, 0,0)` respectively. The amount of work required to separated the two charges infinitely away from each other is

A

`-1.1J`

B

` 2 J `

C

`2.5J`

D

`3J`

Text Solution

Verified by Experts

The correct Answer is:
A
Here, `q_1=4 muC, q_2=-3 muC, r=10 cm =0.1 m`
Electrostatic potential energy , `U=1/(4piepsilon_0)(q_1q_2)/r=9xx10^9xx(4xx10^(-6)xx(-3)xx10^(-6))/0.1`
=-1.1 J
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