General Physics (General Plysics Chapter 19, Problem 30 Review Conceptual Exampl

Question

General Physics (General Plysics Chapter 19, Problem 30 Review Conceptual Example z as background for this problem. Apostve charge +as is located to the left of a negative charge -g2. on a line passing though the two charges, there are two places where the total potential is zero. The first place is between the charges and 4.78 to the left of the negative charge. The second place is 6.17 om to the right of the negative chargn. (a) what is the distance between the charges? (b) find the the of the charges. (a) Number Units (b) Number Click if you would like to show work for this question! oeen Show work Question Attempts: o of 5 used SAve Poa LATER SueMITANSAMER Copyright 2000-20

Explanation / Answer

Vnet = k q1 / r1 - k q2 / r2 = 0

r1 = (d - 4.78) , r2 = 4.78

q1 / (d - 4.78) = q2 / 4.78

q1 / q2 = ( d - 4.78) / 4.78 ..............(i)

for other zero potential point,

k q1 / ( d + 6.17) = q2 / 6.17

q1/ q2 = (d + 6.17) / 6.17 ..... (ii)

equatting both equations,

( d - 4.78) / 4.78 = (d + 6.17) / 6.17

6.17d - 29.49 = 4.78d + 29.49

d = 42.44 cm ..........Ans

(B) q1 / q2 = (42.44- 4.78) / 4.78 = 7.9

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