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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.

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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
You found superconductivity at room-temperatures... I would by a ticket to Stockholm... – Fabian Jun 20 '11 at 12:41

1 Answer

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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.

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

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