+0

# electrical charges ..

0
465
8
+1832

I want explanation for question number 5 . .

physics
Feb 19, 2015

#6
+27336
+15

Original force on charge 1 from the others f = K(q1*q2/d2 + q1*q3/(ā2*d)2 + q1*q4/d2) where K is a constant (I've assumed d1 and d3 are on opposite corners).

(Strictly, we should add these as vectors, but that's an unnecessary complication here.)

If all the q terms are multiplied by 2 and everything else remains the same it is easy to see that a factor of 4 increases each term, and hence the force on charge 1 quadruples.  The same argument applies to all the other charges, so SevenUp is correct.

.

Feb 23, 2015

#1
+95177
+5

Does anyone want to answer one of 315's physics questions?

Feb 20, 2015
#2
+1832
0

Any one ?

Feb 21, 2015
#3
+394
+15

I believe the answer is C, they quadruple. Iām not absolutely certain, but it is logical because each charge increases 100% and there are 4 charges. I know that the potential at any point on the square is the algebraic sums of the individual charges. So a change of magnitude of a charge is directly proportional.

Alan can verify the accuracy or error of my statements.

Your question was lost in the sea, even after Melody bumped it.

_7UP_

Feb 21, 2015
#4
+1832
+5

Thank you Seven up .. amd waiting for Alan .. ~

Feb 21, 2015
#5
+95177
+5

Alan, could you please take a look at this question.

I think 315 and SevenUp are both keen to see your answer.

Feb 22, 2015
#6
+27336
+15

Original force on charge 1 from the others f = K(q1*q2/d2 + q1*q3/(ā2*d)2 + q1*q4/d2) where K is a constant (I've assumed d1 and d3 are on opposite corners).

(Strictly, we should add these as vectors, but that's an unnecessary complication here.)

If all the q terms are multiplied by 2 and everything else remains the same it is easy to see that a factor of 4 increases each term, and hence the force on charge 1 quadruples.  The same argument applies to all the other charges, so SevenUp is correct.

.

Alan Feb 23, 2015
#7
+95177
+5

Thanks Alan

Feb 23, 2015
#8
+1832
+5

Thank you Alan to make it clear ..

thank you Melody and seven up

Feb 25, 2015