(A)Three charges, Q 1 , Q 2 , and Q 3 are located in a straight line. The positi

Question

(A)Three charges, Q1, Q2, and Q3 are located in a straight line.  The position of Q2 is 0.301 m to the right of Q1. Q3 is located 0.180 m to the right of Q2. The force on Q2 due to its interaction with Q3 is directed to the.....                                                                                                                                                
            (True/False)Left if the two charges are negative.          
            (True/False)Right if the two charges are negative.          
            (True/False)Left if the two charges have opposite signs.          
            (True/False)Left if the two charges are positive.          
            (True/False)Right if the two charges have opposite signs.          

Explanation / Answer

B) F1= k*Q1*Q2/r1^2= 9*10^9*1.73*10^-6*3.22*10^-6/(0.301^2) = 0.5533 N towards Q1

F2 = k*Q2*Q3/r2^2 = (9*10^9*3.03*10^-6*3.22*10^-6)/(0.180^2) = 2.7101 N toward Q3

F net = F2-F1 = 2.15 N

C) F1 = k*Q1*Q3/r^2..... F2 = k*Q2*Q3/(r+0.301)^2.

F1 =F2 r = 0.301/(sqrtq2/Q1)-1)= -0.8262

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