Question

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

• A. $122\Omega$
• B. $140\Omega$
• C. $116\Omega$
• D. $100\Omega$

Answer 1

Answer: (D)

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