How to induce current on a static conducting material?

Click For Summary

Discussion Overview

The discussion centers around the concept of inducing current in a static conducting material using a magnetic field. Participants explore the principles of electromagnetic induction, the necessity of changing magnetic flux, and potential methods for achieving this without moving the conductor itself.

Discussion Character

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

Main Points Raised

  • One participant suggests that inducing current requires a change in magnetic flux, implying that movement of magnets is necessary.
  • Another participant questions the purpose of inducing current and expresses uncertainty about whether a current is needed at all.
  • There is a query about the mechanics of moving magnets, including whether to move one or both magnets and the nature of the movement (e.g., left to right).
  • Participants inquire about equations to calculate the required magnetic strength for a given distance and how to create a magnetic field with variable strength.
  • A suggestion is made to watch a video on electromagnetic induction for further understanding, along with the idea of moving the conductor through the magnetic field or rotating it to induce current.
  • One participant provides a formula for calculating magnetic flux as a function of time, linking it to voltage through the time derivative.

Areas of Agreement / Disagreement

Participants generally agree that a change in magnetic flux is necessary to induce current, but there is no consensus on the specific methods to achieve this or the necessity of inducing current in the first place. Multiple competing views and uncertainties remain regarding the setup and approach.

Contextual Notes

Limitations include unclear assumptions about the setup, the dependence on definitions of magnetic flux and strength, and unresolved questions about the practical implementation of the discussed methods.

Who May Find This Useful

Individuals interested in electromagnetic induction, experimental physics, and those seeking to understand the principles of inducing current in conducting materials may find this discussion relevant.

Jay_zero
Messages
2
Reaction score
0
Dear Physicists,

I am currently thinking of a way of inducing a current in a conducting material by a magnetic field. I am not good at magnetism and electricity at all, but I think it should look like the picture below. By the way, the material in the middle does not move.

Physicforum.jpg


Does anyone think that this setup will help induce a current in the material? if not how should I do it. By the way, is it possible to change the strength of the magnets at all? Please guide me in the correct direction as I am very lost here and don't know where to look. Suggestions are much appreciated on what field to look at. Thank you everyone.
 
Physics news on Phys.org
You need a change in magnetic flux to induce current . So you will have to move those magnets some how . What is your purpose for inducing current .
 
cragar said:
You need a change in magnetic flux to induce current . So you will have to move those magnets some how . What is your purpose for inducing current .

It is not used to power up anything electrical at all. However, I think it is silly to say that I don't even know if I really need a current in the material at all. Anyway, so I need to move the magnets? like left to right and back again? Do I have to move both magnets or one magnet? However, are there any equations to calculate how much magnetic strength I need for a given distance? And last question, how to create a magnetic field with variable strength?

Thanks again.
 
Watch the first 20 minutes of this video and he talks about electromagnetic induction and it might help you and it is a very good video.

Or you can move the conductor through the B field to induce current , Maybe you could have it rotating or something.
And if you have it rotating and you know the angular frequency, And you know the field strength , then you can calculate the magnetic flux as a function of time .
Using Flux=Acos(bt) where a is the cross-sectional area and b is the angular frequency
and the time derivative of this will be voltage .
 
Last edited by a moderator:

Similar threads

High School Magnetic field produced by an electric current
  • · Replies 5 ·
Replies
5
Views
2K
High School Thought Experiment on Charge Carriers and Electrical Conduction
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Faraday induction in constant B field, with non-conduction wires
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What Causes Induced EMF in Conductive Bars Moving Through Magnetic Fields?
  • · Replies 20 ·
Replies
20
Views
3K
Undergrad Is This Correct Description of Magnetic Saturation?
  • · Replies 14 ·
Replies
14
Views
2K
Undergrad Can I Apply Voltage to Non-Conducting Plates?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad How induction works within a coil (nuances of it)
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Can Conducting Current Through a Bar Magnet Cause Movement?
  • · Replies 16 ·
Replies
16
Views
2K
Undergrad Power Loss Due to An Eddy Current
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Which law defines the AC inducing voltage in the inductor?
  • · Replies 25 ·
Replies
25
Views
3K