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?

Respuesta :

Answer:

The force at a distance of 3.66 cm from [tex]q_1[/tex] will be zero

Explanation:

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

We have given charges [tex]q_1\ and\ q_2=3q_1[/tex]

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

[tex]E=\frac{KQ}{R^2}[/tex]

[tex]\frac{Kq_1}{d^2}=\frac{K3q_1}{(10-d)^2}[/tex]

[tex]\frac{(10-d)}{d}=\sqrt{\frac{3q_1}{q_1}}[/tex]

[tex]10-d=1.732d[/tex]

d = 3.66 cm

So the force at a distance of 3.66 cm from [tex]q_1[/tex] will be zero