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  4. In the circuit shown, the resistance of voltmeter is 10,000 ohm and that of ammeter is 20 ohm. The ammeter reading is 0.10 ampere and voltmeter reading is 12 volt. Then R is equal to

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Q. In the circuit shown, the resistance of voltmeter is 10,000 ohm and that of ammeter is 20 ohm. The ammeter reading is $0.10$ ampere and voltmeter reading is 12 volt. Then $R$ is equal toPhysics Question Image

Current Electricity

Solution:

$20+R=\frac{12}{0.1} \Rightarrow R=100\, \Omega$