Solving a problem in physics section 45 paragraph 2 el

Solving a problem in physics section 45 paragraph 2 el

2. The voltmeter plugged in series with the resistance R1, showed the voltage U1 = 198 V, and when the series with a resistor R2 = 2R1 showed U2 = 180 V. Determine the resistance R1 and the voltage in the network, if the resistance of the voltmeter r = 900 ohms.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)