How much work has to be done in assembli...

How much work has to be done in assembling three charged particles at the vertices of an equilateral triangle as shown in figure

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Amount of workdone in assembling the charges is equal to the net potential energy
` So, P.E.=V_(12)+V_(13)+V_(23) `
` =(9xx10^3)/10^-1xx10^-10 `
` [4xx2+4xx3+3xx2] `
` 9xx(8+12+6) `
` 9xx26=234J `

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