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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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.