Electronics - Voltage and Current - Discussion


A short circuit will have:

[A]. a small current flow
[B]. a large current flow
[C]. no current flow
[D]. some current flow

Answer: Option B


No answer description available for this question.

Bikash said: (Jan 4, 2011)  
As the resistance zero in short circuit.SO, the current flow is maximum.

Sri said: (Apr 19, 2011)  
hey in short circuits voltage is zero...according to ohms law v=IR, I will be zero..but it is max. how it is?

Nidhya said: (Jun 27, 2011)  
I dunno to tell with respect to ohm's law.

The thing is lik this. When it is short circuited, (it means the ends are connected by a conductor) there is no resistance(ideally infinite) available to stop the flow of electrons. it means current flow is very high(ideal case- infinity).since the charges are moving faster there is no potential difference that exists across the points, hence voltage(ie potential difference) is 0

Nidhya said: (Jun 27, 2011)  
Or with ohm's law itself we an say like:
Here I=infinite; R=0

So, V=0.

Jayanth said: (Jul 1, 2011)  
Thank you Nidhya.

Kiranmai said: (Apr 4, 2012)  
With ohms law we is directly proportional to I irrespective of are then how would be v=0?

Vaijinath.T.R. said: (May 4, 2012)  
According to ohm's law:-


Current is a inversely proportional to the resistance when resistance is 0(short circuit resistance is always 0) the current in a circuit is infinity.

Amit said: (Jan 21, 2014)  
As per ohms law V = IR agreed, but here V you can say as source and v is voltage drop across R, so don't confuse between V and v, here V is source and R is resistance so if R = 0 ohms then v drop across R is o v but due to V source current flows maximum we can say as short circuit current.

Satish Tripathi said: (Mar 7, 2015)  
Short circuit means r=0. So if r is 0 that means i-maxm, so B.

Joseph Ramki said: (Jul 11, 2015)  
Yes, I can understand current flow is max according to ohms law.

Srikanth said: (Nov 3, 2018)  
Could anyone please explain me to get it?

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