- #1
transgalactic
- 1,395
- 0
the question is :
http://i39.tinypic.com/ll89s.gif
the solution is here:
http://i39.tinypic.com/bej341.gif
my question is about part b when calculating the potential between [tex]r_1[/tex] and [tex]r_2[/tex]:
r1<r<r2
we take the potential from the outer sphere (-150)
which is constant inside of it,and we sum with the potential from the inner sphere
which changes by r.
so its -150+( 9*10^9 *10* 10^-9)/r
they get a different expression in another way
my question is,where is my mistake in my way of solving?
http://i39.tinypic.com/ll89s.gif
the solution is here:
http://i39.tinypic.com/bej341.gif
my question is about part b when calculating the potential between [tex]r_1[/tex] and [tex]r_2[/tex]:
r1<r<r2
we take the potential from the outer sphere (-150)
which is constant inside of it,and we sum with the potential from the inner sphere
which changes by r.
so its -150+( 9*10^9 *10* 10^-9)/r
they get a different expression in another way
my question is,where is my mistake in my way of solving?