- #1
Cazicami
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Homework Statement
Consider a thick metal shell with inner radius a = 2cm and b = 4cm. The shell carries no net charge. A point charge of q = 3nC is placed at the centre of the shell. Find the total charged induced on the inner boundary of the shell. Find the total charge induced on the outer boundary of the shell.
5 marks.
Homework Equations
E = q/4∏ ε0 r^2 - I think.
The Attempt at a Solution
My attempt was to use the equation above to work out the charge at each radius. However the answer I get is very wrong. The solutions simply state,
"Obviously, the charge induced on the inner boundary is -3nC, while the charge induced on the outer boundary is 3nC." So this is making me think I have missed something. Considering the value I calculated was E = 67438NC^-1
Any help you can give would be great, as I am studying for my resits.
Thanks