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Faman39 Group Title

Describe the relationship between electricity and magnetism.

  • one year ago
  • one year ago

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  1. Faman39 Group Title
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    @blues can you able to help me with this?

    • one year ago
  2. Devilonline Group Title
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    A changing magnetic field induces electrical current in a wire and is the basis for electrical generation. Also an electrical current flowing through a wire creates a magnetic field and is the basis for most motors. In general a changing magnetic field creates an electrical field and a changing electrical field creates a magnetic field

    • one year ago
  3. s3a Group Title
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    Devilonline: Why is this relationship not perpetual?

    • one year ago
  4. Devilonline Group Title
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    It is perpetual...its never ending like if u dont disturb the magnetic field or electric current it wont stop like in motors and generators

    • one year ago
  5. Mashy Group Title
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    it is indeed perpetual.. and thats where james clerk maxwell comes into play.. he saw that they would keep on doing it. and hence he defined his electromagnetic waves!!

    • one year ago
  6. s3a Group Title
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    Devilonline, how does this not violate conservation of energy?

    • one year ago
  7. Mashy Group Title
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    Cause energy is not lost in the process!

    • one year ago
  8. s3a Group Title
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    I was implying that it was created. But, I'm assuming it's not so ... where is that additional energy obtained from?

    • one year ago
  9. Mashy Group Title
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    see initially some energy is required to create a disturbance.. infact.. in order to get an electromagnetic wave you need to accelerate charges (oscillating charges).. thats what happens when you switch on your bulb... the filament is heated to a high temperature... which causes the atoms to vibrate and they produce these electromagnetic waves.. so after a while the light diminishes right?..

    • one year ago
  10. s3a Group Title
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    If you mean as in the light bulb dying then, yes.

    • one year ago
  11. Devilonline Group Title
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    No as in becoming dull a bit

    • one year ago
  12. Mashy Group Title
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    exactly.. it dies off.. so the disturbance eventually dies off

    • one year ago
  13. Devilonline Group Title
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    No wait ur saying wen we turn on a bulb

    • one year ago
  14. s3a Group Title
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    Devilonline, are you talking to me or Mashy?

    • one year ago
  15. Devilonline Group Title
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    So then like it doesnt die off

    • one year ago
  16. Devilonline Group Title
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    Sorry i shud specify...mashy

    • one year ago
  17. Mashy Group Title
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    all waves.. eventually die off right??.. a ripple in water.. doesn't keep on going continuously.. theoretically it should.. but in reality it doesn't.. thats what I am saying!

    • one year ago
  18. Devilonline Group Title
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    So the light doesnt diminish the waves do no?

    • one year ago
  19. s3a Group Title
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    Ok, what about reality prevents that ripple from continuing? Other ripples that cancel the wave out, etc? So, about an engine, are you saying it would get more and more powerful infinitely if the engine never broke?

    • one year ago
  20. s3a Group Title
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    Without giving it more energy.

    • one year ago
  21. Mashy Group Title
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    the light DOES diminish... cause if you switch on teh bulb.. and you keep going farther and farther away.. the light becomes dull and finally at one point.. for all practical purposes you can't see the light at all!!

    • one year ago
  22. Mashy Group Title
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    @s3a.. i have no idea what you are saying? :P

    • one year ago
  23. Devilonline Group Title
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    Ooohhh!! I get it!! :D

    • one year ago
  24. Devilonline Group Title
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    S3a same here i dnt get what u r saying

    • one year ago
  25. s3a Group Title
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    Sorry lol. Two secs.

    • one year ago
  26. s3a Group Title
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    "It is perpetual...its never ending like if u dont disturb the magnetic field or electric current it wont stop like in motors and generators " This implies that if I give a motor some energy, I will never need to give it any more since it will (perpetually) make it on its own so the motor should go on forever until it breaks but, this doesn't seem to be the case with cards. You need to keep burning fuel (or whatever) to feed energy. So what am I missing? Also, sorry for being difficult to understand. I am presently tired but this topic striked my curiosity.

    • one year ago
  27. s3a Group Title
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    cars*

    • one year ago
  28. Devilonline Group Title
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    That the more electromagnetic energy u need more elcectricity and a stronger magnet u would need otherwise it would have the same magnitude of power...in cars u press the accelerator and it accelerates by getting more power from the battery

    • one year ago
  29. Devilonline Group Title
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    Like if u need a constant EMF source

    • one year ago
  30. Mashy Group Title
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    s3a.. you have friction.. if there was no friction.. then what you said is right!!

    • one year ago
  31. s3a Group Title
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    Mashy, friction with the car parts?

    • one year ago
  32. Devilonline Group Title
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    Oh yea eddy currents

    • one year ago
  33. Devilonline Group Title
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    No eddy currents....u know what they are??

    • one year ago
  34. s3a Group Title
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    I don't know what eddy currents are.

    • one year ago
  35. s3a Group Title
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    What I meant by "car parts" is basically "not tires".

    • one year ago
  36. Devilonline Group Title
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    Mashy the friction is cuz of the eddy currents right?

    • one year ago
  37. Mashy Group Title
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    i mean we live in a world comprised of friction.. thats why we need to put in more energy.. !! if there was no friction.. then a car once set into motion.. will keep moving until it hits something :P.. and friction inside car parts, friction between tyres and roads.. even if there was only friction INSIDE car parts.. but not outside.. then also.. once car set in motoin

    • one year ago
  38. Devilonline Group Title
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    Mashy also because of eddy currents

    • one year ago
  39. s3a Group Title
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    Mashy, I didn't understand what you said about if there was friction only INSIDE.

    • one year ago
  40. s3a Group Title
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    Ok so the bottom line is, energy can be created perpetually but it is lost to friction so the end result is you need to put more energy in manually?

    • one year ago
  41. s3a Group Title
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    Rather than relying on the "perpetual"ness.

    • one year ago
  42. Mashy Group Title
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    yea yea.. correct .

    • one year ago
  43. s3a Group Title
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    I think a better word would be "obtained" rather than "created". Would it?

    • one year ago
  44. s3a Group Title
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    For the energy.

    • one year ago
  45. Devilonline Group Title
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    Yesssss!!! I think i got confused about my concepts too by this question lol

    • one year ago
  46. s3a Group Title
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    Glad, I could do my part lol. :)

    • one year ago
  47. Devilonline Group Title
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    Wait which grade r u in s3a?

    • one year ago
  48. s3a Group Title
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    I already did my first electromagnetic course (before university). Right now, I'm going to 2nd year software engineering.

    • one year ago
  49. s3a Group Title
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    Non-university level by the way.

    • one year ago
  50. s3a Group Title
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    For the E&M course.

    • one year ago
  51. Devilonline Group Title
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    OMG and im explaining this to u lol no wonder i got confused by ur questions....ohbwait u did ur electromagnetic course but u dont know about eddy currents O.o

    • one year ago
  52. s3a Group Title
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    Maybe I just don't know them by name.

    • one year ago
  53. s3a Group Title
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    Did you learn that in the first year undergrad course (US system)?

    • one year ago
  54. Devilonline Group Title
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    Eddy currents (also called Foucault currents[1]) are electric currents induced within conductors by a changing magnetic field in the conductor. These circulating eddies of current have inductance and thus induce magnetic fields. These fields can cause repulsive, attractive,[2] propulsion, drag and heating effects. The stronger the applied magnetic field, or the greater the electrical conductivity of the conductor, or the faster the field changes, then the greater the currents that are developed and the greater the fields produced.

    • one year ago
  55. Devilonline Group Title
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    Nope olevels (cambridge system)

    • one year ago
  56. s3a Group Title
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    Well, I don't remember the stuff well and I need to review but is that like getting the intensity of the induced emf?

    • one year ago
  57. s3a Group Title
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    I don't know the UK system. Do you have a school before University and after High school?

    • one year ago
  58. Devilonline Group Title
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    What comes before senior year in highschool?

    • one year ago
  59. s3a Group Title
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    That just confused me more lol. In Canada, there is high school and then University but in Quebec there is high school --> CEGEP/College --> University

    • one year ago
  60. s3a Group Title
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    Do you have a middle school like that?

    • one year ago
  61. s3a Group Title
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    Again, I'm tired right now so sorry if I say stupid things.

    • one year ago
  62. Devilonline Group Title
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    No like ok ill make it simple im talking about the 11 and 12th grade

    • one year ago
  63. s3a Group Title
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    Well, I technically did it in 13th if I remember correctly and I did the waves course before instead of after.

    • one year ago
  64. s3a Group Title
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    waves, optics, modern physics

    • one year ago
  65. Devilonline Group Title
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    Oohk that makes sense now

    • one year ago
  66. Devilonline Group Title
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    Yea we do it in the 12th grade

    • one year ago
  67. Devilonline Group Title
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    Sorry i meant 11th

    • one year ago
  68. s3a Group Title
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    Oh, 11th I did kinematics, optics, stuff like that.

    • one year ago
  69. s3a Group Title
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    Anyways, this was nice but, I have to go fix a computer now so I'm going to go. Thank you both. @Devilonline and @Mashy

    • one year ago
  70. Devilonline Group Title
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    Lol nice working with u lol tc

    • one year ago
  71. s3a Group Title
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    You too. :) Bye.

    • one year ago
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