how to determine if your circuit will not work?

[jerec]

i design a power supply circuit with a voltage regulator and a variable resistor..why is that its ohm measurement reaches Gohm and the voltage output works fine...

[RavensFan]

Where does LabVIEW fit into this question?

Are any National Instruments Data Acquisition products used in the measurements?

So far your question sounds like it belongs on a electrical design forum.

[aeastet]

Are you asking about a physical circuit? You do realize this is a software forum right?

[altenbach]

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@jerec wrote:

i design a power supply circuit with a voltage regulator and a variable resistor..why is that its ohm measurement reaches Gohm and the voltage output works fine...

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Is this a multisim or a hardware question?

(As others have already said, this does not look like a LabVIEW questions.)