Experimenting with Magnetic Fields and Electric Currents

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Discussion Overview

The discussion revolves around the interaction between magnetic fields and electric currents, particularly in experimental setups involving wires, magnets, and capacitors. Participants explore various scenarios and implications of electromagnetic induction, including practical applications and theoretical questions.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant describes the process of generating electric current by cutting magnetic field lines with a wire and references the right-hand rule.
  • Another participant confirms that current will flow through an iron fork if both ends of the wire are connected to it, emphasizing the need for a complete circuit.
  • A scenario is proposed where a wire connected to a capacitor is moved between two magnets, raising questions about the capacitor's ability to store electricity generated by the movement.
  • Concerns are expressed about the unpredictability of the charge a capacitor can store and its rapid discharge compared to batteries, suggesting limitations in using this method for practical applications.
  • Questions are raised about identifying the positive and negative sides of the capacitor, the amount of electricity generated by moving the wire, and methods to increase current production.
  • A participant seeks clarification on the distinction between current and electricity, indicating a desire for deeper understanding.

Areas of Agreement / Disagreement

Participants generally agree on the basic principles of electromagnetic induction but express differing views on the practical implications and limitations of using capacitors in the described scenarios. The discussion remains unresolved regarding the specifics of current generation and capacitor functionality.

Contextual Notes

Participants express uncertainty about the amount of current generated and the effectiveness of capacitors in practical applications. There are also unresolved questions about the identification of charge polarity and methods to enhance current production.

Who May Find This Useful

This discussion may be useful for individuals interested in experimental physics, electromagnetic theory, and practical applications of capacitors in electrical circuits.

bigmack
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I know that when you cut magnetic field lines with a wire you get an electric current.

I know that if the left side of your screen was a magnet with its south side facing the north side of an other magnet which is the right side of your screen, and a wire coming in from the top of your screen cut the magnetic field created between the two magnets would have the current going into your screen.
(sorry if that's confusing, basically I know about the rigt hand rule)

What I want to know is, if you had the wire connected to something else, like maybe an iron fork, would the current flow to the iron fork?
 
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If both ends of the wire were connected to opposite ends of the fork, then a current would flow through the fork. There is no current if the wire is not connected to anything.
Bob S
 
So I'd have to connect both ends of the wire cutting the field to the fork.

Ok, then. Different scenario, say, I have two magnets, with opposite poles facing each other, and then I take a wire and connect both its ends to a capacitor and then move parts of the wire between the magnets.
Will the capacitor capacitate the electricity and then let me use it later on to do something like power up my wii-mote?
 
bigmack said:
So I'd have to connect both ends of the wire cutting the field to the fork.

Ok, then. Different scenario, say, I have two magnets, with opposite poles facing each other, and then I take a wire and connect both its ends to a capacitor and then move parts of the wire between the magnets.
Will the capacitor capacitate the electricity and then let me use it later on to do something like power up my wii-mote?

Yes it will as long as you move the wire in one direction and not back again.

But...
You have no idea how much charge the capacitor will "take on" store even if the capacitor has specifications. And capacitors usually discharge rather abruptly unlike batteries. So using this to "power up" something... I would not count on doing anything useful with this.
 
Ok, I think I get it.

But how would you know which side is positive and which side is negative? How would I connect it to the capacitor? I realize, there's no point in doing this, its just something that I'm interested in.

Oh and, around how much electricity would moving the wire across the field generate?
Any substantial amount?
Is there any way I can increase the amount of current produced in a single swipe through the fields?


oh and are current and electricity the same thing?
 
*BUMP*
I'd appreciate it if someone could help, this things killing me. oh and thanks Bob and Pgardn [ ^o), "Pgardn"? ]
 

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