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erisedk
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Homework Statement
A spherically symmetric charge distribution has net positive charge Q distributed within a radius of R.
Its electric potential V as a function of the distance r from the center of the sphere is given by the following.
[tex]V(r)=\frac{kQ}{R}( -2+3{\frac{r^2}{R^2}})[/tex]for r<R
[tex]V(r)=\frac{kQ}{R}[/tex] for r>R
https://www.physicsforums.com/file:///page5image8000 https://www.physicsforums.com/file:///page5image8160 https://www.physicsforums.com/file:///page5image9232 Express all algebraic answers in terms of the given quantities and fundamental constants.
- (a) For the following regions, indicate the direction of the electric field E(r) and derive an expression for its magnitude.
i. r < R____ Radially inward ____ Radially outward
ii. r > R____ Radially inward ____ Radially outward
The answer to (i), i.e., r<R is radially inward.
Homework Equations
The Attempt at a Solution
How can the field due to a positive charge be radially inward?
For (ii), it's radially outward, which is fairly straightforward, because field lines will originate radially from the sphere, but inside, INWARD??
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