PHYS 251 MT2 © 2017 Penn State University Form 17. This is not a multiple choice

Question

PHYS 251 MT2 © 2017 Penn State University Form 17. This is not a multiple choice question.(15 points) The upper-center charge is -Q (i.e., negative). A. Based on this diagram, what can you deduce from this diagram about the other charges? Clearly mark a+ or- on top of the other two charges on the diagram) 0 B. From far away, does this appear to be a dipole, + point charge, or -point charge? Briefly explain your reasoning for your answer. Pipole C. Rank the strength ofthe E field at points A, B, C from GREATEST to least. Briefly explain your reasoning for your answer is doser to a C a te middle 4 and a t chavge,an A D. Draw the E field vector at point A on the diagram above. E. In moving from point A to point B, what is happening to the potential ? auh (Increasing, decreasing or not changing?) Briefly explain your reasoning for your answ

Explanation / Answer

It will behave as a negative point charge

point charge because we are talking about very large distance . if we go to very large distance from these collection of charges we can then calculate the net force on a small test charge , which will be nothing but vector sum of forces applied by all the charges. and since the distance is very large , we can neglect the distance between these charges and consider as if the set of charges were a point charge.

the assumed point charge will be negative because we can see the intensity of electric field lines which is higher in case of negative charges. we can just calculate the no. of field lines of both postive and negative charges and check which one greater , the greater one will have the overall effect .

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