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Coulomb's law, Physics question, which force is greater Force 12 or Force 21? Explain

Coulomb's law, Physics question, which force is greater Force 12 or Force 21? Explain
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Answer #1

According to coulumb 's low force between two charges q1 and q2 is proportional to q1.q2

Now force on the second charge due to first charge is -

1 1 92 2 12

Also force on the first charge due to second charge is -

141 42 t,

Here r21 and r12 are the unit vectors

As r12=-r21 hence F12=-F21

It means both the force are equal but in opposite direction.

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