three point charges, which are equally separated by a distance 20 cm, are arranged along the y-axis in a vacuum. The topmost charge bears a charge of – 4.0μC, the middle charge has a charge of +3.0 μC, and the bottom one carries a 7.0 μC charge. What is the magnitude and direction of the net electrostatic force that the middle charge experiences?
Answer
Charge
Q=-4
So all are seperated by d=0.2m
Net electrostatic force that the middle charge
So putting all values
So force is
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