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![[Post New]](/templates/default/images/icon_minipost_new.gif) 16 Feb 2008 01:02:21 IST
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can there be any current across two ends even without any potential difference b/w them??? is vice-versa true???explain..........
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My destiny , not dream
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yes certainly....in the figure attached.....
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padhna likhna chad de mitra , nakal te rakhi aas , chak chaddar te so ja bhagta , Rabb karega tennu paas.....
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17 Feb 2008 17:18:18 IST
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but how
charge flows to attain equilibrium
but equillibrium of potential is already present
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17 Feb 2008 17:52:26 IST
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no
just tell me can water level in a u tube be at different level without any external pressure
uptill now i am tought tht current flows only when thier is potential difference
whole physics is based on this simple concept like wheatstone bridge
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"If u win u need not have to explain and if u lose thn u should not be there to explain"
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17 Feb 2008 18:22:48 IST
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arrrrey i have shown u the diagram.....telll me whats wrong in it????? ya u r right ....current can't flow in a unique direction b/w two points of a circuit at same potential....but i think qns. wordings is not dis...so now what u think???
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padhna likhna chad de mitra , nakal te rakhi aas , chak chaddar te so ja bhagta , Rabb karega tennu paas.....
PLZ NEVER EVER RATE ME FOR MY ANSWERS , IF U WANT TO COMPLIMENT ME THEN JUST BEAT UR HEAD & SAY
"YEH KIS PAGAL NE MERA QN. SOLVE KER DIYA"
I AM SERIOUS!!!!
EVEN SERIOUS ^ INFINITY
PLZZZZZZ NEVER RATE ME....HOPE U WILL UNDERSTAND....
Shubham
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17 Feb 2008 18:42:34 IST
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Arey Shubham bhai Kya hai yeh??
Write KVL for outer loop considering a resistor between the 2 cells
E-E-iR=0
i.e iR=0
i.e i=0
You are wrong bro!! No current flows without a potential difference
But Opposite is Possible
Consider a nonconducting rod moving in a time varying magnetic field......EMF (induced)=non zero but current=0(of course)
Hope this helps.....Nudge for any difficulty!!
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17 Feb 2008 18:46:52 IST
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what if u apply kirchoff in only one loop considering a resistance in the middle wire....u ppl r nt getting ma point,,,,.....current in a unique direction can't flow when there is no potentail difference....in the above dia. current is changing direction but it is flowing.....kirchoff's law is aplicable when I is in unique direction(i think so).....hope u understand ma pt.....
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padhna likhna chad de mitra , nakal te rakhi aas , chak chaddar te so ja bhagta , Rabb karega tennu paas.....
PLZ NEVER EVER RATE ME FOR MY ANSWERS , IF U WANT TO COMPLIMENT ME THEN JUST BEAT UR HEAD & SAY
"YEH KIS PAGAL NE MERA QN. SOLVE KER DIYA"
I AM SERIOUS!!!!
EVEN SERIOUS ^ INFINITY
PLZZZZZZ NEVER RATE ME....HOPE U WILL UNDERSTAND....
Shubham
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17 Feb 2008 18:51:23 IST
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How is there no flow of current in the attached dia?. The two ends are at diff potentials!
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17 Feb 2008 19:05:13 IST
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One end is connected to the negative end of the batteries and the other to the positive
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17 Feb 2008 19:40:01 IST
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shubam..................
i didnt get ur figure.........................
Through which part of the wire r u saying tht potential difference is zero but there is a current flowing.....
if it is the middle wire the potential difference is not zero.
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17 Feb 2008 20:51:34 IST
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shubham is absolutely rite.....u connect some resistances in circuit(not in the middle wire) and current will flow....even in the middle wire...
i = v/R since V and R both are approaching 0...its an indeterminate form...
so we have to determine it using KVL...
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17 Feb 2008 21:14:07 IST
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i=v/r
since v=0
i=0
I cannot get how r is approaching towards 0
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17 Feb 2008 21:31:09 IST
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see...its a zero resistance wire....thats the reason why pd across that wire is 0 (coz all points on a zero resistance wire are at same potential)
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17 Feb 2008 21:41:42 IST
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current cannot flow without potential difference.
potential difference causes the current to flow.....p.d is the cause while current is the result.
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17 Feb 2008 21:45:34 IST
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