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Faman39
 2 years ago
Best ResponseYou've already chosen the best response.0@blues can you able to help me with this?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1A 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

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Devilonline: Why is this relationship not perpetual?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1It is perpetual...its never ending like if u dont disturb the magnetic field or electric current it wont stop like in motors and generators

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0it 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!!

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Devilonline, how does this not violate conservation of energy?

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0Cause energy is not lost in the process!

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0I was implying that it was created. But, I'm assuming it's not so ... where is that additional energy obtained from?

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0see 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?..

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0If you mean as in the light bulb dying then, yes.

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1No as in becoming dull a bit

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0exactly.. it dies off.. so the disturbance eventually dies off

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1No wait ur saying wen we turn on a bulb

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Devilonline, are you talking to me or Mashy?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1So then like it doesnt die off

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Sorry i shud specify...mashy

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0all 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!

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1So the light doesnt diminish the waves do no?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Ok, 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?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Without giving it more energy.

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0the 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!!

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0@s3a.. i have no idea what you are saying? :P

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Ooohhh!! I get it!! :D

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1S3a same here i dnt get what u r saying

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0"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.

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1That 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

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Like if u need a constant EMF source

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0s3a.. you have friction.. if there was no friction.. then what you said is right!!

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Mashy, friction with the car parts?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Oh yea eddy currents

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1No eddy currents....u know what they are??

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0I don't know what eddy currents are.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0What I meant by "car parts" is basically "not tires".

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Mashy the friction is cuz of the eddy currents right?

Mashy
 2 years ago
Best ResponseYou've already chosen the best response.0i 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

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Mashy also because of eddy currents

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Mashy, I didn't understand what you said about if there was friction only INSIDE.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Ok 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?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Rather than relying on the "perpetual"ness.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0I think a better word would be "obtained" rather than "created". Would it?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Yesssss!!! I think i got confused about my concepts too by this question lol

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Glad, I could do my part lol. :)

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Wait which grade r u in s3a?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0I already did my first electromagnetic course (before university). Right now, I'm going to 2nd year software engineering.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Nonuniversity level by the way.

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1OMG 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

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Maybe I just don't know them by name.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Did you learn that in the first year undergrad course (US system)?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Eddy 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.

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Nope olevels (cambridge system)

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Well, I don't remember the stuff well and I need to review but is that like getting the intensity of the induced emf?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0I don't know the UK system. Do you have a school before University and after High school?

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1What comes before senior year in highschool?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0That just confused me more lol. In Canada, there is high school and then University but in Quebec there is high school > CEGEP/College > University

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Do you have a middle school like that?

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Again, I'm tired right now so sorry if I say stupid things.

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1No like ok ill make it simple im talking about the 11 and 12th grade

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Well, I technically did it in 13th if I remember correctly and I did the waves course before instead of after.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0waves, optics, modern physics

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Oohk that makes sense now

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Yea we do it in the 12th grade

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Oh, 11th I did kinematics, optics, stuff like that.

s3a
 2 years ago
Best ResponseYou've already chosen the best response.0Anyways, this was nice but, I have to go fix a computer now so I'm going to go. Thank you both. @Devilonline and @Mashy

Devilonline
 2 years ago
Best ResponseYou've already chosen the best response.1Lol nice working with u lol tc
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