(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Revered members,

Please see my both attachments.

2. Relevant equations

F_{21}= (q_{1}q_{2}/4∏ε_{0}r_{12}^{2})*r_{12}cap(unit vector)

Is it wrong to use r_{12}instead of r_{21}for F_{21}. Because my second attachment uses r_{21 }for F_{21}and r_{12}or F_{12}. I am confused. Please help which is correct.

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Coulomb's law in vector form

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