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rizardon
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Homework Statement
Consider two thin conducting spherical shells. The inner shell has a radius r1=15cm and a charge of 10.0 nC. The outer shell has a radius r2=30cm and a charge of -15.0 nC.
Find
a)the electric field E and
b)the electric potential V in A, B and C, with V=0 t r=infinity
A: r<r1
B: r1<r<r2
C: r>r2
Homework Equations
E=kq/r2
V=kq/r
The Attempt at a Solution
Using the above formula, I get
For the region A
E=0 and V=0 because the charge within a conducting shell is 0
For the region B
E= k(10 nC)/r2, r1<r<r2
V= k(10 nC/r
For the region C
E=k (10 nC + -15 nc)/r2=k(-5 nC)/r2
V=k(-5 nC)/r
Am I doing it the right way?