A4.0 µc point charge and a 3.0 µc point charge are a distance l apart. where should a third point charge be placed so that the electric force on that third charge is zero? (use the following as necessary: l.)

Q must be placed at 0.53 L

Explanation:

Given  data:

q_1 = 4.0 μC , q_2 = 3.0μC

Distance between charge is L

third charge q be placed at  distance x cm from q1

The force by charge q_1 due to q is

                 ----1

The force by charge q_2 due to q is

                  --2

we know that net electric force is equal to zero

F_1 = F_2

x = 0.53 L

Q must be placed at 0.53 L

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