Take the 2-minute tour ×
Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It's 100% free, no registration required.

Hi I've done an experiment in physics using a basic circuit. Can anybody explain how come the data logging equipment I was using continued to register a current when there isn't a positvie voltage in the circuit.

share|improve this question
3  
What Is that "basic circuit"? Sigh. –  Georg Jun 20 '11 at 10:23
    
How much of a current are you measuring? Is it just (60 Hz) noise? –  Nick T Jun 20 '11 at 10:47
    
You may think there is zero volts in a circuit when in fact there is a finite small value. How large was the current registered? –  John McVirgo Jun 20 '11 at 11:07
1  
You found superconductivity at room-temperatures... I would by a ticket to Stockholm... –  Fabian Jun 20 '11 at 12:41
add comment

1 Answer 1

If you have a short circuit you may have just few millivolts, and still a significant current.

Another option - when measuring voltage you probably not connected ground properly of your voltmeter.

And finally, small current might be just calibration error.

share|improve this answer
    
Finally this is pure speculation. Are You eggbound? Can't You wait until Scrimley clarifies? –  Georg Jun 20 '11 at 16:00
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.