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ehrenfest
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[SOLVED] Griffiths induced charge
I am so insanely confused about induced charge.
Griffiths does this problem in which a charge q is held a distance d above an infinite grounded conducting plane and then he calculates that the induced charge on the plane is -q (section 3.2.1). But if you start with just your charge q far away from the neutral conducting plate and then bring in the charge q to the distance d, you start out with total charge q and end up with total charge 0. How in the world is this not a violation of charge conservation?!? Please help me -this is a serious contradiction.
Also, in problem 3.37, I was able to calculate the induced surface charge in part b but then part c really threw me off. Apparently I have to integrate over both spheres to get the total charge which is absolutely insane because before the person glued the charge on the outer sphere there was only that much charge "in the world" and then suddenly all this new charge appears on the inner sphere? WHAT IS WRONG HERE?!??!
Homework Statement
I am so insanely confused about induced charge.
Griffiths does this problem in which a charge q is held a distance d above an infinite grounded conducting plane and then he calculates that the induced charge on the plane is -q (section 3.2.1). But if you start with just your charge q far away from the neutral conducting plate and then bring in the charge q to the distance d, you start out with total charge q and end up with total charge 0. How in the world is this not a violation of charge conservation?!? Please help me -this is a serious contradiction.
Also, in problem 3.37, I was able to calculate the induced surface charge in part b but then part c really threw me off. Apparently I have to integrate over both spheres to get the total charge which is absolutely insane because before the person glued the charge on the outer sphere there was only that much charge "in the world" and then suddenly all this new charge appears on the inner sphere? WHAT IS WRONG HERE?!??!
Homework Equations
The Attempt at a Solution
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