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Home > Science > Physics   »   DC Currents

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Old Feb 28, 2007, 06:25 PM
marinegurl
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DC Currents
I have a question in regards to potentiometry. How can Vo be changed to allow a null current reading? and why can a null current be registered for sufficiently small Vo.?

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Old Mar 1, 2007, 02:20 AM   #2  
colbtech
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V=IR, where V is the voltage, I is the current and R is the resistance.

So you can see that (as R is a set value and doesn't change) any value of V will require a value for I. Therefore if V=0 I =0. Hope so anyway.
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Old Mar 1, 2007, 02:22 AM   #3  
Capuchin
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Yeah you can minimise V by turning off the apparatus.

heh.

You need to give us a better idea of what you are doing, what experiment you are performing, and then we can give you a better answer.
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