-hc is at Q2. ( 5m on the x axis. (h You have to show all your steps to score. 1
ID: 1791571 • Letter: #
Question
-hc is at Q2. ( 5m on the x axis. (h You have to show all your steps to score. 10 points) A positive charge qu ,-10 C is located at-3 m on the x axis. A negative charge q2 w3b 2. , 3c. 5, and some other similar ones...) x--3 m x= 3 m 1. (For what finite value(s) of x is the electric potential zero?) Where the electric potential would be zero other than at infinity? Circle all correct choices. There may be more than one. A. At the center between the two charges. B. In between the two charges and closer to q C. In between the two charges and closer to q D. Somewhere to the right of q2 E. Somewhere to the left of qu 2. Calculate the electric potential at a point P along the axis at x = 1 m. the required external work to bring a third change of q 2 HC from infinity to location P? Hint: What is the potential energy change associated with bringing the third charge?Explanation / Answer
1] option C and D are correct.
The point should be closer to q2 than q1 as q2 has lower magnitude as compared to q1.
Potential = kq1/r1+kq2/r2
2] Potental = kq1/r1+kq2/r2. = 9e9*(10e-6/(3+1) - 1e-6/(3-1)) = 18000 V answer
3] Work to be done = q3*V = 2e-6*18000 = 0.036 J answer
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