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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

`9 xx 10^(4) J`

B

`18xx 10^(4) J`

C

`45 xx 10^(-2)`

D

`9 xx 10^(-1)J`

Text Solution

Verified by Experts

The correct Answer is:
C
`W= Delta U_a= (K (5 times 10^-6)(10 times 10^-6))/0.5- (K(5 times 10^-6)(10 times 10^-6))/1=45 times 10^-2 J`.
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