Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-l] induced emf and induced current



Hi Bob,

In AP Physics's objectives, for example, the students need to calculate the magnitude and direction of the induced emf and current in a loop of wire or a conducting bar. Although the current is usually considered a scalar, eddy current (or Foucault current) can be clockwise or anticlockwise which is circular in nature. There could be alternative conception such as induced emf is in the same direction as current for eddy current?

On a side note, for Faraday's disc or homopolar generator, the induced emf could be considered as towards the centre, and similarly for the induced current? Or some may think that the induced current spiral into the centre? Some may also teach that induced emf may not necessarily have induced current depending on the resistance of the "circuit". There could be many alternative conceptions? Just curious...


Alphonsus

Quoting "LaMontagne, Bob" <RLAMONT@providence.edu>:

Do you mean induced field? EMF is a scalar.

Bob at PC

-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of carmelo@pacific.net.sg
Sent: Tuesday, October 06, 2009 11:42 PM
To: phys-l@carnot.physics.buffalo.edu
Subject: [Phys-l] induced emf and induced current

Hi everyone,

Does induced emf *always* have the same direction as the induced current?


Best regards,
Alphonsus

_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@carnot.physics.buffalo.edu
https://carnot.physics.buffalo.edu/mailman/listinfo/phys-l