The test charge is 12 mm from Q1 and 20 mm from Q2. If Q1 has a relative charge of +4e and Q2 has a relative charge of +8e determine the magnitude and direction of the the result force acting on the test charge.

4 answers

Use the formula ... F=1/4(PI) €¤ *Q1Q2/r^2 where r=12*10^-3.
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