The network voltage U = 100 connected to the coil

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Uploaded: 04.03.2014
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The network voltage U = 100 in the coil connected to the resistance R1 = 2 k and a voltmeter connected in series. Voltmeter indications U1 = 80. When the coil replaced by another, the voltmeter shows U2 = 60. To determine the resistance R2 of the other coil.

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Task 30033. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.
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