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Calculate internal resistance of meter. There is a 10V power supply with a variable resistor connected in series. The meter will be connected across the resistor. I adjust the resistor until the reading in the meter read about 5.37V. The value of resistance is 15 ohms. How do I calculate the internal resistance? This is the equation I used

5.37V=10V((Rm*15)/(Rm+15))

I solve for Rm and get 559kOhm. Does this look correct?

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# Homework Help: Internal Resistances

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