Problema + Hard 16-1.    Source:  Problem prepared by the author of the site.

Calculate the values ​​of R₁, R₂ and R₃ so that the voltmeter shown in the figure below can measure up to 1 volt when the selector switch is in the x1 position, 10 volts in the x10 position, and 100 volts in position x100. The measuring instrument is a microammeter with full scale of 100 µA and internal resistance of 500 Ω conform shown in Figure 16-01.1

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