Which Rod Transfers More Charge to a Metal Ball?

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The discussion centers on the charge transfer between a charged rod and a neutral metal ball. It questions whether a charged plastic rod or a charged metal rod can transfer more charge to the metal ball. The interaction method is also considered, specifically whether the rods touch the ball at a single point or through another method. The nature of the rods being positive is highlighted, impacting the charge dynamics. Understanding these interactions is crucial for determining the efficiency of charge transfer.
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Let's say we have a charged plastic rod and a neutral metal ball, and a charged metal rod and neutral metal ball, which rod can transfer more charge onto the metal ball? Or metal ball onto the rod (if the rods are positive)
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How are you making them interact? Just touching one point of the rod to the ball, in either case, or in some other way?
 
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