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Charges 5 muC and 10 muC are placed 1 m ...

Charges `5 muC and 10 muC` are placed 1 m apart. Work done to bring these charges at a distance 0.5 m from each other is `(k = 9 xx 10^(9) SI)`

A

`7xx10^(-1)J`

B

`9xx10^(-1)J`

C

`9xx10^(1)J`

D

`9xx10^(-2)J`

Text Solution

Verified by Experts

The correct Answer is:
B
`9xx10^(-1)J`
Explanation: Work done:
`=(1)/(4piepsi_(0))(q_(1)q_(2))/(r)`
`=9xx10^(9)xx(5xx10^(-6)xx10xx10^(-6))/(0.5)`
`=9xx10^(-1)J`
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