thants so far or the excellent help status, however I am still a little confused, why will dr go to zero? isn't that the thickness of the shell? why does that alter, am i looking at this in the wrong way, i though it was the shell moving from infinity ( infinitely small charge as it has...
thanks, but one last question, i can discard all terms of dr^2 or higher as they are significantly small, is that correct?
also I am confused in the potwential, arnt i moving one charge from infinity towards the other charge?
also how do i get this in the dw form?
yes i meant to write:
as Q2=p.(4/3pi(r^3-(r-dr)^3)
--->and p= Q/(4/3)pi.R^3
therefore Q2= (Q(r^3-(r-dr)^3))/R^3
thats the simplified as it was meant to be written in terms of Q.
Im not sure of the formula but work done is = qQ/4pi epsilon0 a
where a would be the distance one charge has...
hi,
this is a great forum here and i was wondering if anyone could lend a helping hand , it would be great.
im currently studying at univercity for electronics engineering and have been given some physics questions to work onover the holidays. I ahve spend quite some time on this question...