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ALL PHYSICS DOUBTS - POST HERE !!

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Amr Fouad:

--- Quote from: \m/ |\|!d \m/ on April 04, 2010, 06:14:34 am ---Diagrams correct....but voltage jst the opp

In the first one,  P.D across the wire would be 12V, since resistance of the wire is negligible and there is no other component....
Whenever you see a switch open, remember, no current flows, and hence, there is no P.D

--- End quote ---

Hey, that is totally incorrect..

Yes it is true, in the 1st diagram, the voltage is zero. V=IR, and R=o, therefore V=0..

Again, in the second one, V=o, as I=0..

nid404:
In the first diagram, R is not equal to zero, practically speaking, if you set up something like this in the lab, you will get a little less than 12V across the first circuit...im dead sure....cuz indirectly we r measuring the emf of the battery for the first one....

haris94:
i agree with nid404
diagram 1: 12V
diagram 2: 0V

Amr Fouad:
guys..this O-level..it is not A-L..

ask astar.pm him if u dont believe me...

V=RI...R=0...so V=0..period.

nid404:
doesn't matter which level it is dear...

I am dead sure....anyway u want to ask him...go ahead...always better to clear ur doubts

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