YumYum247
  • YumYum247
help me!!!!
Physics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
YumYum247
  • YumYum247
YumYum247
  • YumYum247
@Astrophysics
YumYum247
  • YumYum247
you men 3.14159265"4"

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More answers

Astrophysics
  • Astrophysics
Lol, ok lets do this
YumYum247
  • YumYum247
LOL
Astrophysics
  • Astrophysics
Oh man I haven't done this in years, ok lets see, I should know this!!
YumYum247
  • YumYum247
what is the trick to the first question?!?!?!?!
Astrophysics
  • Astrophysics
Ah ok you have to just label the poles for induced magnetic field and current
YumYum247
  • YumYum247
yes XD
Astrophysics
  • Astrophysics
It's that right hand rule or what ever
Astrophysics
  • Astrophysics
Ok actually, so the bar moves through the coil correct
YumYum247
  • YumYum247
yes !!
YumYum247
  • YumYum247
:)
Astrophysics
  • Astrophysics
So as it moves inside the coil you would have S and N as you had labelled I see those erase marks
YumYum247
  • YumYum247
wait, ignore the direction of the current...i am not sure if those arrows are correct..
Astrophysics
  • Astrophysics
And if it were reverse the poles will switch
YumYum247
  • YumYum247
cuz i made them....sorry
YumYum247
  • YumYum247
the diagram is without the arrows..
Astrophysics
  • Astrophysics
Haha I don't even know the context of this question then
Astrophysics
  • Astrophysics
@IrishBoy123 when in doubt with E&M tag irishboy ;)
YumYum247
  • YumYum247
he doesn't respond to my tags!! X(
Astrophysics
  • Astrophysics
haha ok, so explain me this question
Astrophysics
  • Astrophysics
What are we doing with the bar magnet
YumYum247
  • YumYum247
i guess we have to assume that the coil doesn't have a magnet inside it but it's just a referrence point to give us the direction
Astrophysics
  • Astrophysics
So as the bar magnet moves into the coil as I was saying there will be an induced current! Ah yes Mr. Faraday!
YumYum247
  • YumYum247
they gave me an exaple like this....|dw:1449799652880:dw|
YumYum247
  • YumYum247
the left side of the coil has an alternating current that produces an alternating magnetic filed to produce an induced current in the right coil
YumYum247
  • YumYum247
yes yes that's what it means!!!
YumYum247
  • YumYum247
so what are you asking for???? what's missing
YumYum247
  • YumYum247
hold on let me give you a similar example from the book.....maybe that'll help////
YumYum247
  • YumYum247
Astrophysics
  • Astrophysics
Yeah so do what I was saying if the magnet is moved towards the coil with S and N pole |dw:1449800489939:dw| this is how it will look, notice the direction of the current and if the poles are reversed the induced current will go the opposite direction
YumYum247
  • YumYum247
|dw:1449800675567:dw|
Astrophysics
  • Astrophysics
But you have to also note the direction of the motion
IrishBoy123
  • IrishBoy123
are you learning Lenz's law?!
YumYum247
  • YumYum247
yuss
Astrophysics
  • Astrophysics
Right hand rule stuff eh
IrishBoy123
  • IrishBoy123
'cos i'm following astro and i think i get the gist that all we really need to do is focus on the effect of shoving a magnet inside a coil. [hope that makes sense.]
YumYum247
  • YumYum247
it's forward......|dw:1449800814102:dw|
IrishBoy123
  • IrishBoy123
so if you shove a N pole magnet inside a solenoid, that end becomes a N pole yes?
YumYum247
  • YumYum247
idk
YumYum247
  • YumYum247
comparing from my previous examples.... i think yes *fingers crossed*
IrishBoy123
  • IrishBoy123
harrumph !! if it becomes a south pole, we will have created a free source of energy, better than perpetual motion. it resists the motion.
YumYum247
  • YumYum247
ok so the actually poles changes..........?!?!?!? O_oo_O
YumYum247
  • YumYum247
|dw:1449801227094:dw|
IrishBoy123
  • IrishBoy123
as the bar magnetic passes through the solenoid, the polarity of the solenoid should flip, yes.
IrishBoy123
  • IrishBoy123
and so the current should change direction.
YumYum247
  • YumYum247
i don't know anything about current.....up or down?????????
IrishBoy123
  • IrishBoy123
in a solenoid, round and round.
YumYum247
  • YumYum247
that was jus an example......i mean in a coil...up or down???
YumYum247
  • YumYum247
|dw:1449801499122:dw|
YumYum247
  • YumYum247
we have to assume that the coil is a circuit.
YumYum247
  • YumYum247
|dw:1449801663210:dw|
YumYum247
  • YumYum247
YumYum247
  • YumYum247
|dw:1449801768725:dw|
IrishBoy123
  • IrishBoy123
i'd use the right hand thumb rule. so, on this side of the coil [above the page], the current is flowing N-S.
YumYum247
  • YumYum247
ok so where is my thumb pointing N or S????
IrishBoy123
  • IrishBoy123
i have no idea, i cannot see your thumb. jk the emf of the coil will oppose the motion of the magnet. it has to, and that is why energy must be expended in shoving the magnet in there, in the first place. magnetic fields follow the usual procedure. wrap a wire in your hand, the thumb follows the current. the fingers, wrapped around the wire, follow the B field.
YumYum247
  • YumYum247
can you please refer me to a link???????i'll learn it myself.....
IrishBoy123
  • IrishBoy123
https://www.youtube.com/watch?v=he3ByTc2OQo and all of his other stuff.
YumYum247
  • YumYum247
Thank you!!!
IrishBoy123
  • IrishBoy123
and this https://www.youtube.com/watch?v=nGQbA2jwkWI

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