Need help with Charged objects and Electron Force

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Homework Help Overview

The problem involves two charged objects: a plate with a charge of -3 microC and a rod with a charge of +2 microC. The objective is to determine how many electrons need to be transferred from the plate to the rod so that both objects have the same charge.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the amount of charge that needs to be transferred from the plate to achieve equal charges on both objects. There is a suggestion to first consider the charge in microC before calculating the number of electrons.

Discussion Status

The discussion is ongoing, with participants exploring different amounts of charge transfer and questioning the assumptions about the final charges on both objects. Some calculations have been attempted, but there is no consensus on the correct amount of charge to be transferred.

Contextual Notes

Participants are considering the requirement that the final charges must be equal in magnitude and sign after the transfer of charge, which has led to further questioning of initial assumptions.

Haniszmi
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Homework Statement


A plate carries a charge of -3microC, while a rod carries a charge of +2microC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?


Homework Equations


N= q/e


The Attempt at a Solution


I tried finding the amount of electrons and I stopped there, I really don't know how to go about with this problem.
 
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Before worrying about electrons, how much charge (in microC) must be transferred from the plate?
 
Redbelly98 said:
Before worrying about electrons, how much charge (in microC) must be transferred from the plate?

1/2 microC's?
 
Haniszmi said:
1/2 microC's?

Let's see what happens in that case.

The -3 μC plate loses 0.5 μC, and so ends up with a charge of -3.5 μC.

The +2 μC rod gains +0.5 μC charge, ending up with 2.5 μC.

The final charges, -3.5 and +2.5 μC, are not equal. So no, it would not be 0.5 μC transferred.

The charges should be equal in magnitude and sign, (either both +, or both -) after the charge transfer.
 
wow thx
 

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