Basic Electricity Question - Potential Electric

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Homework Help Overview

The discussion revolves around a problem in basic electricity involving charge transfer between a negatively charged plate and a positively charged rod. The original poster seeks to determine how many electrons must be transferred to equalize the charges on both objects.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants explore the implications of transferring charge between the plate and the rod, questioning the resulting charges and the number of electrons involved in the transfer. There is uncertainty regarding the correctness of calculations and interpretations of charge values.

Discussion Status

The discussion is active with participants providing various interpretations and calculations related to the charge transfer. Some guidance has been offered regarding the calculations of electrons, but there is no explicit consensus on the correct approach or final answer.

Contextual Notes

Participants express confusion about the problem setup and the correctness of their calculations, indicating a need for clarification on charge values and the implications of transferring charge.

cheechnchong
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Homework Statement



Question: a plate carries a charge of -3.0 uC, while a rod carries a charge of +2.0 uC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?


The Attempt at a Solution



N= q/e = -2.0e-6/-1.6e-19 = 1.25e13 electrons transferred

something doesn't seem right about this problem. the prof didnt mark this wrong, but he marked -2.0e-6 C wrong? anyone with the fix?
 
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If you transfer 2uC from the rod to the plate, what will be the charges on both objects?
 
Galileo said:
If you transfer 2uC from the rod to the plate, what will be the charges on both objects?

-3.0 uC and +2.0 uC ...when you sum them up you get -1.0 uC? each with -0.5 uC? then, 2.5 uC when you subtract from 3.0 uC?

find how many electrons in 2.5 uC? is that how much is transferred?

too many questions!:confused: :confused: :confused:
 
think that's right, eg taking away from one and giveth to the other;
-3-deltaC=2+deltaC so -2.5uC
 
^^that's it right? just calculate electrons for 2.5 uC and that's that right?
 
You're good best I can tell, but technically its -2.5uC, some profs might not care, others most definitely will.
 
Last edited:
appreciate it doc. i'll go ahead and take your word.
 

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