Magnetic fields & induced current.

  • Thread starter bayan
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  • #1
bayan
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would increasing the speed at which magnet passes through a coil Increase,Reduce or does not change the amount of electromagnetic induction?

cheers

personally I would go with increase but want to see if I am right
 

Answers and Replies

  • #2
Doc Al
Mentor
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Well... what do you base your answer on?
 
  • #3
bayan
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Doc Al said:
Well... what do you base your answer on?


I had it all wrong :redface:

I though the question was like a DC generator.


I know what it mean and the only effect it would have is the emf value, not the current.

Thanx for askin what I base my answer on, it made me re-read the question on the past exams and now I understand. Maybe I shouldn't do homework at 2:20 :rofl:
 
  • #4
bayan
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the answer is Increase but why? if it moves faster it will have greater emf which is Voltage how does it increase the amount of ElectroMagnetic Induction? isn't amount of ElectroMagnetic induction Current?

can someone clarify this please.

thanx
 
  • #5
cliowa
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bayan said:
I know what it mean and the only effect it would have is the emf value, not the current.

Well, what does the emf value mean? You already mentioned it's voltage.
Now suppose the wire/the coil has a constant resistance (which is a pretty good approximation if you're not running gigantic currents through it): What will happen? You do know Ohm's Law, right?

Here's the answer in white, in case you won't find it out:
You should be easily able to see (using V=R*I) that a higher voltage also leads to a higher current!

Regards...Cliowa
 
  • #6
bayan
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Thanks mate.
 

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