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How do you hook up a voltmeter to measure the voltage across a resistor

Royalty
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Too low of an internal resistance in a voltmeter will adversely affect the circuit being measured. Now, the voltmeter can only indicate the voltage its connected across.
It is worthy to reiterate the fact that this method, properly executed, places almost zero load upon the measured circuit. Since voltmeters are always connected in parallel with the component or components under test, any current through the voltmeter will contribute to the overall current in the tested circuit, potentially affecting the voltage being measured. However, despite its practical inability to achieve absolute zero loading, a potentiometric circuit is still an excellent technique for measuring voltage in high-resistance circuits. Sign up using Email and Password. Parasics and its Influences at Hard-Switching This training video will identify where the parasitics in the gate driver system, and illustrate its influences on hard-switching power However, despite its practical inability to achieve absolute zero loading, a potentiometric circuit is still an excellent technique for measuring voltage in high-resistance circuits.

Voltmeter Impact on Measured Circuit

Jewel
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Here we can clearly see that the two voltages are in parallel.
Published under the terms and conditions of the Design Science License. However, despite its practical inability to achieve absolute zero loading, a potentiometric circuit is still an excellent technique for measuring voltage in high-resistance circuits. So with a 5V input, the ADC will see. Imagine using a tire pressure gauge that took so great a volume of air to operate that it would deflate any tire it was connected to. Hopefully the internal impedance of the volt meter is very high so very little current flows.
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