Three electric charges are arranged on a straight line as...

Three electric charges are arranged on a straight line as shown in the figure. Select True or False for the following statements. True False If Q1 is negative, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right. True False If Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MUST feel a net force to the right. True False If Q1 is positive, Q2 is negative and Q3 is positive, then Q2 MIGHT feel a net force to the right. True False If Q1 is positive, Q2 is negative and Q3 is negative, then Q2 MUST feel a net force to the right. In the above figure, R = 1.86 m, Q1 = 1.57×10^-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.

Transcript

00:01 Hi, here this given problem is based upon the picture, having three charges, co -linear charges.

00:11 The gap between the charges are each.

00:16 Here this is q1, the middle one that is q2, the last that is q3.

00:22 In the first part of the problem, it is said that q1 is negative, q2 that is also a negative and q3 this is positive means here this is negative negative and positive so as far as this q2 is concerned it will be repaired by q1 towards right and it will be attracted by q3 that is also towards right so we can say q2 will feel net force towards q3 that is towards q3 means towards right so the given statement is true as the statement is also saying the force setting on q2 that must be towards right so the statement that is true then in the second problem this time q1 that is positive q2 that is negative q3 again this is positive so q2 will be attracted towards left and right q2 will be attracted in both the directions left direction and right direction so as we don't know which one of the force will be more hence we can say the force the q2 must not feel force in any preferred direction so the statement is false the statement is false as q2 must not experience the force in any particular direction until we don't know which of the force is greater than in the next part in the third part this time q1 that is positive, q2 that is negative, q3 again that is positive.

03:52 So again q2 will feel force in both the directions.

03:57 So no specific direction, hence false.

04:03 This one is false.

04:07 Then in the next one, q1 that is positive.

04:14 Q2 that is negative.

04:18 Q3, again this is positive.

04:22 So q2 might feel a net force towards right.

04:29 Q2 might feel net force towards right.

04:37 It is not necessary.

04:39 It might feel.

04:41 So the statement is true.

04:45 Then in the next part, q1 that is positive, q2, negative, q3 that is also negative...