1. Why differential amplifiers are preferred for instrumentation and industrial applications?

A. Input resistance is low

B. Produce amplified output

C. Amplify individual input voltage

D. Reject common-mode voltage

2. Which of the following is a combination of inverting and non-inverting amplifiers?

A. Differential amplifier with one op-amp

B. Differential amplifier with two op-amps

C. Differential amplifier with three op-amps

D. Differential amplifier with four op-amps

3. What will be the output voltage when V_{x} =0v?

(Where V_{x} –> inverting input terminal of differential amplifier with one op-amp)

A. V_{o} = -(1+R _{F}/R_{1})*V_{1}

B. V_{o} = -(1- R _{F}/ R_{1})*V_{1}

C. V_{o} = (1+ R _{F}/ R_{1})*V_{1}

D. V_{o} = (R _{F}/ R_{1})*V_{1}

4. Compute the output voltage from the following circuit diagram?

A. -17v

B. -27v

C. -39v

D. -15v

5. Compute the output voltage if the input voltage is reduced to zero in a differential amplifier with one op-amp?

A. Inverted Voltage

B. Same as the input voltage

C. Amplified inverted voltage

D. Cannot be determined

6. The difference between the input and output voltage is -1v and 17v. Calculate the closed-loop voltage gain of differential amplifier with one op-amp?

A. -51

B. 34

C. -17

D. 14

7. For the differential amplifier given below, determine the V_{x} and R_{F} value. Assume that the circuit is initially nulled.

A. V_{x} = -8v, R_{F} = 9.9kΩ

B. V_{x} = 8v, R_{F} = 9.9kΩ

C. V_{x} = -8v, R_{F} = -9.9kΩ

D. V_{x} = 8v, R_{F} = -9.9kΩ

8. The gain of a differential amplifier with one op-amp is the same as that of

A. The inverting amplifier

B. The non-inverting amplifier

C. Both inverting and non-inverting amplifier

D. None of the mentioned

9. Find the value of input resistance for differential amplifier with one op-amp. If R_{1} = R_{2}=100Ω and R_{F} = R_{3} =5kΩ.

A. R_{IFx} = 110Ω; R_{IFy} = 6.7kΩ

B. R_{IFx} = 100Ω; R_{IFy} = 5.1kΩ

C. R_{IFx} = 150Ω; R_{IFy} = 7.2kΩ

D. R_{IFx} = 190Ω; R_{IFy} = 9.0kΩ

10. What is the net output voltage for a differential amplifier with one op-amp

A. V_{o} = -(R_{F} /R_{1})*V_{x}

B. V_{o} = -(R_{F} /R_{1})*(V_{x} -V_{y})

C. V_{o} = (1+R_{F} /R_{1})*(V_{x} -V_{y})

D. None of the mentioned