Three electric charges are arranged on a straight line as shown in the figure. 2

Question

Three electric charges are arranged on a straight line as shown in the figure. 2 3 Select Tieo is positve, 02 io Inegia ve atnd es tis posiive, then Q2 MIGHT feel a net force to the right. TrueIf Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MIGHT feel a net force to the right. True If Q1 is negative, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right. TrueIf Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right. FalseIf Q1 is positive, Q2 is negative and Q3 is negative, then Q2 MUST feel a net force to the right. Submit Answer Incorrect. Tries 5/6 Previous Tries In the above figure, R = 1.14 m, Q1 = 2.20×10-6 C, Q2=-Q1 and Q3=-Q1. Calculate the total force on Q2. Enter your response as positive if the force is to the right and negative if the force is to the left. Submit Answer Tries 0/20

Explanation / Answer

Assuming that all the charges have same magnitude of charge but the polarity differs as per the statements given:

1)False

Since Q1 and Q3 will pull Q2 to their respective sides equally so it will be stabl at its place with no net force.

2)True

Q1 will push Q2 to the right and Q3 will pull it to the right, so the net force in right direction.

3)False

Since Q1 and Q3 will pull Q2 to their respective sides equally so it will be stabl at its place with no net force.

4)False

Q1 will pull Q2 to the left and Q3 will push it to the left, so there will be no net force.

Given,

R = 1.14 m ; Q1 = 2.2 x 10^-6 ; Q2 = -2.2 x 10^-6 and Q3 = -2.2 x 10^-6

F2 = F12 + F12

F2 = 9 x 10^9 [(2.2 x 10^-6 x 2.2 x 10^-6)/1.14^2 + (2.2 x 10^-6 x 2.2 x 10^-6)/1.14^2)] = 0.067 N

Hence, Fnet = 0.067 N ; towards left.

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