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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122 Ω

140 Ω

116 Ω

100 Ω

answer is D.

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Detailed Solution

20+R=120.1 ⇒R=100 Ω

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