Two positively charged particles q1 and q2 = 3q1 are 10.0 cm apart. where (other than at infinity) could a third charge q3 be placed so as to experience no net electric interaction?

The force at a distance of 3.66 cm from will be zero

Explanation:

Electric force experienced will be zero where electric field will be zero .

We have given charges

Distance between the charges = 10 cm

Let at d distance from q_1 electric field will be zero , so distance from q_2 =10-d

According to coulombs law electric field is given by

d = 3.66 cm

So the force at a distance of 3.66 cm from will be zero

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