Magnetic effect of electric current

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Discussion Overview

The discussion revolves around the differences and similarities between the magnetic fields produced by electric currents and those produced by bar magnets. Participants explore concepts related to magnetic fields generated by straight conductors, solenoids, and the nature of magnetic poles.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants assert that the magnetic field produced by a straight current-carrying conductor is circular and does not have poles, while others argue that all magnetic fields, including those from solenoids, exhibit north and south poles.
  • There is a discussion about the necessity of a closed loop for current flow, with some stating that a straight wire is an artificial construct and that a loop is required to exhibit magnetic poles.
  • Participants express confusion about how a magnetic needle behaves in the presence of a magnetic field from a current-carrying conductor and how this relates to the concept of magnetic poles.
  • Some participants mention the Biot-Savart law and its relevance to understanding the magnetic field around conductors.
  • There are references to the idea that poles are not fundamentally important but are locations where field lines are concentrated.
  • Several participants seek clarification on how magnetic poles are formed in solenoids and how this relates to the behavior of magnetic needles.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the nature of magnetic fields produced by currents versus those produced by magnets. Multiple competing views remain regarding the existence and significance of magnetic poles in different contexts.

Contextual Notes

Some statements reflect uncertainty about the definitions and implications of magnetic fields, particularly concerning the behavior of magnetic needles and the concept of poles in various configurations.

  • #31
That 'knowledge' is available in many many places - in pretty well all elementary Physics books.
 
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  • #32
sophiecentaur said:
That 'knowledge' is available in many many places - in pretty well all elementary Physics books.
Can you suggest some good books on physics
 
  • #33
Karan Punjabi said:
Can you suggest some good books on physics
Almost anything you can get your hands on that you find understandable. Does your school / college / whatever have any such books? As I don't know your present state of learning, I can't be any more specific, I'm afraid.
 
  • #34
Basically, I'm studying in college and one of my classmate has a book named as HC VERMA on physics.My classmate says its an advanced book but first i want to go for basics in physics.
 
  • #35
My best suggestion is that you ask a teacher at your college. That will (should) put you in the right direction. :smile:
 
  • #36
Karan Punjabi said:
Yeah t

Yeah the lines of solenoid and bar magnet are never ending they are like a loop. And can you tell me that by making a conductor's shape into circular coil like structure and passing current through it how one end is described as north pole and one as south, just want to know that exactly what happens?
The "poles" are just places where the field lines are concentrated. If you make a loop then the field lines are concentrated inside the loop. Hence you get poles.

I think you are placing WAY too much emphasis on poles. They are not particularly important. Not all field configurations have them, and many field configurations have many more than just two.

You should stop worrying about poles and learn about fields. All this effort on understanding poles is wasted effort.
 
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  • #37
DaleSpam said:
The "poles" are just places where the field lines are concentrated. If you make a loop then the field lines are concentrated inside the loop. Hence you get poles.

I think you are placing WAY too much emphasis on poles. They are not particularly important. Not all field configurations have them, and many field configurations have many more than just two.

You should stop worrying about poles and learn about fields. All this effort on understanding poles is wasted effort.
Ohk I got it everyone thank you for so much of help actually i was really thinking for the poles too much but now i have got it.
 
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