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Old 03-03-2016, 07:31 PM
Dr. Strangelove Dr. Strangelove is offline
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Quote:
Originally Posted by Chronos View Post
Other way around. A voltmeter is supposed to only allow a negligible amount of current through it, and thus should have a resistance much greater than the circuit does (which, in this case, it would).
That's exactly what umop ap!sdn said.

To be clear, most multimeters have two basic modes:
- Voltage measurement. The two leads have high resistance and the meter is connected in parallel with the device to be measured. All but a tiny amount of current flows through the device.
- Current measurement. The leads have negligible resistance between them and the meter is connected in series. All of the current flows through the meter, and there is a negligible voltage drop from the meter's small internal resistance.

In this case, we have:
ImeterRmeter = IplateRplate

Imeter is tiny, while Rmeter is large. Iplate is large while Rplate is tiny.