Electronics circuits (ECE)

[bhuna.balu11@gmail.com]

Why when there is current flow there is no voltage measured across it???

 

[dean_winchester]

current follows the low resistance path..when u connect a voltmeter to measure voltage.. the resistance provided by the voltmeter is high than wire itself.
So, no current flows thru voltmeter and hence, no voltage is measured.
Connecting a load usually serves the purpose.

 

[jeffrey samuel]

you may always find that the voltmeter is never connected in series and always in parallel this is cos the resistance offered by it is really high when compared to normal wire.

but for a current to flow we need much lesser resistance and so the voltmeter is never connected in series with any element

what really is the use of a voltmeter????

to measure the difference in potential between two ends how in the world do we measure it by connecting it in series

 

[tpetar]

Why when there is current flow there is no voltage measured across it???

This is not true. Current cant flow without voltage. And if you want to measure voltage "in serial" just look current shunt principe.

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Where is problem you must have very sensitive voltmeter, usually in mili range, to measure this values.

 

[jeffrey samuel]

really true sir but can the voltage be measured by connecting a voltmeter in series

i think the questioner must be more specific and precise in their qn

 

[tpetar]

Voltage, otherwise known as electrical potential difference or electric tension (denoted ∆V and measured in units of Electric potential: volts, or joules per coulomb), is the electric potential difference between two points — or the difference in electric potential energy of a unit test charge transported between two points.

http://en.wikipedia.org/wiki/Voltage

http://www.kpsec.freeuk.com/voltage.htm