Negative Rod and Negative Conductors

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Discussion Overview

The discussion revolves around the concept of induction, particularly in the context of a negatively charged rod and negatively charged conductors. Participants explore whether induction occurs in this scenario and the implications of charge movement between the conductors.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions whether induction occurs with a negatively charged rod and two negatively charged conductors, and if so, whether it involves electron movement from one conductor to another depending on their charge levels.
  • Another participant suggests that the actual quantities of charge involved would influence the possibility of increasing the negative charge on a conductor.
  • A third participant provides a definition of induction related to electromagnetic principles, stating that in the given scenario, no induction occurs unless there is physical contact, which would lead to conduction instead.
  • A later reply introduces the concept of electrostatic induction and references "The Electrophorus" as an example of this phenomenon.

Areas of Agreement / Disagreement

Participants express differing views on whether induction occurs in the described scenario, with some suggesting it does not happen without contact, while others propose that charge levels could still play a role. The discussion remains unresolved regarding the specifics of induction in this context.

Contextual Notes

There are limitations regarding the assumptions about charge quantities and the definitions of induction and conduction that participants have not fully clarified.

BankerGoneBio
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Hello,

I am trying to understand induction. If I have a negatively charged rod, and two negatively charged conductors, does no induction occur? or is the induction simply the movement of the electrons from the more negatively charged conductor to the less negatively charged conductor? or does this all depend on the degree of the negative charges?

Thanks
 
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It would depend upon the actual quantities involved. Clearly it would be possible to in crease the negative charge on an already negatively charged conductor.
 
hi there
welcome to PF :)

Induction is the generation of a current flowing in a conductor when it moves in a magnetic field ( or conversly a stationary conductor in a moving magnetic field)

Induction is what happens in a transformer, when there is mains voltage at 50/60Hz input and some stepped down voltage to run you laptop etc on the output
In this case you have 2 coils of wire, the first coil, the primary winding of the transformer has an AC current flowing through it, this produces a varying magnetic field around that coil.
The secondary winding ( coil) of the transformer is placed within that magnetic field and a current is induced into that coil.

another example would be of the induction of a current from an electromagnetic (EM) radio wave into an antenna.
The antenna is stationary on its mast and the EM waves are passing across the receiver antenna. That EM wave induces a current to flow in the wire of the antenna.

In your example, I don't see any induction occurring, if you touch the rod to one of the conductors, then CONDUCTION will occur and there will be a movement of charge ( electrons) between the two till the balances.

hope that helped :)

Dave
 
There is also electrostatic induction. See "The Electrophorus" for the most elementary version of the phenomenon.
 

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