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CK beat me to it. Incidentally, as you read that really fine print on the meter face down near the pivot, you might see something like "FS 50ua". That's the amount of current (50 microamperes) needed to drive the meter movement itself to exactly full-scale.

And mathematically it will also tell you the meter's sensitivity in terms of ohms per volt. Using Ohm's law in CKs example, I=E/R, so

current = 100 volts / 20,000 ohms = 0.00005 amperes = 50 microamperes.

[QUOTE="Beetle, post: 423633, member: 1066"] CK beat me to it. Incidentally, as you read that really fine print on the meter face down near the pivot, you might see something like "FS 50ua". That's the amount of current (50 microamperes) needed to drive the meter movement itself to exactly full-scale. And mathematically it will also tell you the meter's sensitivity in terms of ohms per volt. Using Ohm's law in CKs example, I=E/R, so current = 100 volts / 20,000 ohms = 0.00005 amperes = 50 microamperes. [/QUOTE]

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