Saitama
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Conducting sphere connected to the ground
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Hint:
1. wire is connected to inner surface.
2. it asks for charge moved from the sphere and to the ground.
The text says "sphere radius r" but the diagram shows a sphere inner radius r and an unspecified outer radius. Does it make a difference?
1. wire is connected to inner surface.
2. it asks for charge moved from the sphere and to the ground.
The text says "sphere radius r" but the diagram shows a sphere inner radius r and an unspecified outer radius. Does it make a difference?
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[ IMG]https://www.physicsforums.com/attachment.php?attachmentid=58610&d=1368159359[/PLAIN]Pranav-Arora said:Homework Statement
(see attachment)
Homework Equations
The Attempt at a Solution
The ground is at zero potential. Hence, the sphere should be also at zero potential. The net charge should be zero, so a charge of -Q should flow from the ground to sphere. But this is wrong.
One could state the result as you have, but that wasn't what the question asked.
Last edited:
Saitama
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Simon Bridge said:
The inner surface has no charge according to the figure. So a charge of +Q should flow to the ground for a negative charge of -Q to appear and bring the potential down to zero?
Simon Bridge[/quote said:
No idea about this.
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The problem asks the charge flowing from the sphere to the ground. The whole sphere is at the same potential (both outside and inside) Current flows if there is potential difference across the resistance, between the sphere and the ground. Till there are charges on the sphere, there is potential difference. That negative charge you speak about does not appear, but the positive disappears
ehild.
ehild.
Saitama
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ehild said:The problem asks the charge flowing from the sphere to the ground. The whole sphere is at the same potential (both outside and inside) Current flows if there is potential difference across the resistance, between the sphere and the ground. Till there are charges on the sphere, there is potential difference. That negative charge you speak about does not appear, but the positive disappears
ehild.
Got it, thanks ehild!
