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Voltmeter

10. A Voltmet...

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10. A Voltmeter is connected in parallel with a variable resistance R which is in series with an ammeter and a cell as shown in the figure. For one value of R, the meter reads 0.3A and 0.9V . For another value of R the reading are 0.25 A and 1.0 V. What is the internal resistance of

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