# X.?i5Square One Four point charges form a squar...

x.?i5Square One

Four point charges form a square with sides of length , as shown in the figure. In the questions that follow, use the constant in place of .

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javascript:void(0) Part A
What is the electric potential at the center of the square?

Make the usual assumption that the potential tends to zero far away from a charge.

Express your answer in terms of , , and appropriate constants. =
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Part B
What is the contribution to the electric potential energy of the system, due to interactions involving the charge ?
Express your answer in terms of , , and appropriate constants. =
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Part C
What is the total electric potential energy of this system of charges?Express your answer in terms of , , and appropriate constants. =
, plz i want just the final answers , thanks
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1.  Part A: Part B:   2. thaanks

part E , = Correct

, what about part D ??
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What would be the kinetic energy of charge at a very large distance from the other charges?
Express your answer in terms of , ,and appropriate constants. =
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3. sorry for the typing mistake.......PART A :7.0706* kq/d is the answer
I updated the solution but you did not see the earliersbmission

Part E: when 2q is far away it is neglected and theremaining three charges are considered in terms of only q and d
4. you are right , and thanks , but , what about the part (A) ,part (c)
plz i need it
5. I corrected the calculation as please see

I corrected the calculation of total potential energyinvolving 2q as below and updated it ;
This is 6. partA: dist of each charge from centre is  So I am correcting the step below  *2 *2= 7.0706kq/d
partB: potential energy involving 2q  partC potential energy of system   7. i lost most of my points :(:(:( all parts are wrong:``(
part (A)
 Submitted Answers Submitted Evaluated 1.44                 wrong

part (c)
 Submitted Answers Submitted Evaluated Message ?29.8 wrong ?1.03×10?8 The correct answer involves the variable which was not part of your answer. wrong
8. part A , is wrong and i get in it :``((
(( Allowedattempts exceeded; answer withheld by teacher))
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part B
part C
is correct , and thanks
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i have more 2 part , may u can help me in it :
PartD
What would be the kinetic energy of charge at a very large distance from the other charges?
Express your answer in terms of , ,and appropriate constants. =
javascript:submitFlash(fp%5B'problemView10'%5D)javascript:requestHintList(1606999,10,'problemView','')Part E
What will be the potential energy of the system of charges when charge is at a very large distance from the other charges?
Express your answer in terms of , ,and appropriate constants. =
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9. part A: part B: partC: Note I already corrected and updated my originally submittedsolution
10. +q                               -3q +2q                              +5q
the distance between charges to thecenter     d / the direction of the field are towards   -3q.
V tot =q/k* [1/( d / ) +1/( d / )+1/( d / )-1/ ( d / )]
= q/k[ /d]
b) U = (-3q)(2q)/k*[1/ d]
c) Utot =(-3q)/k*[ (q/d) + (5q/d) +(2q/ d)]