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![[Post New]](/templates/default/images/icon_minipost_new.gif) 14 Dec 2007 23:17:52 IST
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(silly though) electromag induction do we talk abt direction of induced current or emf???
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14 Dec 2007 23:46:53 IST
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pls reply.....
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15 Dec 2007 00:28:17 IST
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they are the same. EMF means a potential difference, which causes motion of electrons. conventional current (induced current) is opposite to this motion of electrons.
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15 Dec 2007 04:20:46 IST
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That's true. We r talking about induced e.m.f associated with induced current and vice-versa
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15 Dec 2007 16:50:42 IST
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we generally dont associate direction with emf.and emf is between two points.but when current is induced in a circular loop between which two pts is the emf between??
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15 Dec 2007 17:20:33 IST
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thats the point, instead of a cell which causes flow of electrons, the changing flux,etc causes a force on the electrons throughout the body.
if a wire is present and electrons are forced to move toward left, then +ve potential should be the one on the right.
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5 Feb 2008 23:45:41 IST
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anyone else???
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5 Feb 2008 23:50:05 IST
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emf is the work done in transfering charges across a wire in the form of current, as work done is scalar
it is directionless
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5 Feb 2008 23:56:29 IST
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an induced current is caused in a circular ring due to change in magnetic flux......
it is caused due to a time varying magnetic field......
as such,there are no such particular points which can be said to be at different potentials at any point of time....
this is because ourscale of measurement is not small enuf to measure the small time gap between the chamges in potential of the points.....
as such,all we get is a continuous change of emf through the ring which causes the induced current.....
if the time scale was adequate enuf to measure minute gaps in time,i suppose we cud hav obtained which are the points on the circular ring which get affected by the varying magnetic field first and give rise to a potential difference,causing induced current......its kind of abstract in the sense that we dont get any fixed points which have a difference in potential.....rather we only get a sense of direction of the current or induced emf.....
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6 Feb 2008 06:49:04 IST
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both r inter related without emf there is no current
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