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Represent the force between the two poin...

Represent the force between the two point charges in terms of position vectro graphically.

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`vecv_(21)=vecv_(2)-vecv_(1)`
Force on `q_(2)` due to `q_(1)`
`vecF_(21)=(1/(4pi epsilon_(0)))(q_(1)q_(2))/(r^(3))vecr_(21)`

where `r=|vecr_(21)|` and `vecr_(21)=vecr_(2)-vecr_(1)`
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