Image:Null-balance voltmeter.png
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An illustration for how to use a potentiometer and known voltage supply to measure a voltage across a portion of an unknown circuit. The potentiometer's resistance is changed at the wiper until the null detector shows zero voltage between the two circuits.
where
Vt: Voltage across test points
Vk: Known voltage
Re: Potentiometer resistance from one end terminal to the other end terminal
Rw: Potentiometer resistance from wiper to end terminal
 |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 20:31, 21 August 2005 | 579×237 (6 KB) | A-Day (Talk | contribs) | (An illustration for how to use a potentiometer and known voltage supply to measure a voltage across a portion of an unknown circuit. The potentiometer's resistance is changed at the wiper until the null detector shows zero voltage between the two circuits) |
| 19:46, 21 August 2005 | 579×237 (6 KB) | A-Day (Talk | contribs) | (An illustration for how to use a potentiometer and known voltage supply to measure a voltage across a portion of an unknown circuit. The potentiometer's resistance is changed at the wiper until the null detector shows zero voltage between the two circuits) |
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