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When measuring the resistance of a resistor using a multimeter does it matter if I turned the resistor around and have the probes at opposite leads?

Should I get the same results?

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  • \$\begingroup\$ I recommend you to test it and find out. Especially since the question is part of your experiment :) \$\endgroup\$ – nidhin Oct 21 '15 at 18:14
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    \$\begingroup\$ If the resistor is in circuit, the circuitry around it (including diodes, transistors, ICs) can make a difference when you swap the meter probes around. \$\endgroup\$ – Brian Drummond Oct 21 '15 at 18:42
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A simple resistor has no polarity as far as its resistance is concerned. The resistance is the same regardless of the orientation of the probes across it.

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With an ordinary resistor, you should get the same answer both ways round.

If the leads and probes have different surface impurities, or finger-grease, you may set up enough contact voltage to disturb the reading a little.

Lead temperature effects, while possible, should be below the resolution of most meters.

Resistor diode effects should only appear in the most horrible old corroded resistors.

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