Malvino: MCQ in Linear Op Amp Circuits

(Last Updated On: February 7, 2020)
MCQs in Linear Op-Amp Circuits

This is the Multiple Choice Questions in Chapter 20: Linear Op-Amp Circuits from the book Electronic Principles 7th Edition by Albert Malvino. If you are looking for a reviewer in Electronics Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.

Topic Outline

  • MCQs in Inverting Amplifier Circuits
  • MCQs in Noninverting Amplifier Circuit
  • MCQs in Inverter and Noninverter Circuits
  • MCQs in Differential Amplifier
  • MCQs in Instrumentation Amplifiers
  • MCQs in Summing Amplifier Circuits
  • MCQs in Current Boosters
  • MCQs in Voltage Controlled Current Sources
  • MCQs in Automatic Gain Control
  • MCQs in Single Supply Operation

Start Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. In a linear op-amp circuit, the

  • a. Signals are always sine waves
  • b. Op amp does not go into saturation
  • c. Input impedance is ideally infinite
  • d. Gain-bandwidth product is constant

2. In an ac amplifier using an op amp with coupling and bypass capacitors, the output offset voltage is

  • a. Zero
  • b. Minimum
  • c. Maximum
  • d. Unchanged

3. To use an op amp, you need at least

  • a. One supply voltage
  • b. Two supply voltages
  • c. One coupling capacitor
  • d. One bypass capacitor

4. In a controlled current source with op amps, the circuit acts like a

  • a. Voltage amplifier
  • b. Current-to-voltage converter
  • c. Voltage-to-current converter
  • d. Current amplifier

5. An instrumentation amplifier has a high

  • a. Output impedance
  • b. Power gain
  • c. CMRR
  • d. Supply voltage

6. A current booster on the output of an op amp will increase the short-circuit current by

  • a. ACL
  • b. Beta dc
  • c. funity
  • d. Av

7. Given a voltage reference of +2.5 V, we can get a voltage reference of +15 V by using a

  • a. Inverting amplifier
  • b. Noninverting amplifier
  • c. Differential amplifier
  • d. Instrumentation amplifier

8. In a differential amplifier, the CMRR is limited mostly by

  • a. CMRR of the op amp
  • b. Gain-bandwidth product
  • c. Supply voltages
  • d. Tolerance of resistors

9. The input signal for an instrumentation amplifier usually comes from

  • a. An inverting amplifier
  • b. A transducer
  • c. A differential amplifier
  • d. A Wheatstone bridge

10. In the classic three op-amp instrumentation amplifier, the differential voltage gain is usually produced by the

  • a. First stage
  • b. Second stage
  • c. Mismatched resistors
  • d. Output op amp

11. Guard driving reduces the

  • a. CMRR of an instrumentation amplifier
  • b. Leakage current in the shielded cable
  • c. Voltage gain of the first stage
  • d. Common-mode input voltage

12. In an averaging circuit, the input resistances are

  • a. Equal to the feedback resistance
  • b. Less than the feedback resistance
  • c. Greater than the feedback resistance
  • d. Unequal to each other

13. A D/A converter is an application of the

  • a. Adjustable bandwidth circuit
  • b. Noninverting amplifier
  • c. Voltage-to-current converter
  • d. Summing amplifier

14. In a voltage-controlled current source,

  • a. A current booster is never used
  • b. The load is always floated
  • c. A stiff current source drives the load
  • d. The load current equals ISC

15. The Howland current source produces a

  • a. Unidirectional floating load current
  • b. Bidirectional single-ended load current
  • c. Unidirectional single-ended load current
  • d. Bidirectional floating load current

16. The purpose of AGC is to

  • a. Increase the voltage gain when the input signal increases
  • b. Convert voltage to current
  • c. Keep the output voltage almost constant
  • d. Reduce the CMRR of the circuit

17. 1 ppm is equivalent to

  • a. 0.1%
  • b. 0.01%
  • c. 0.001%
  • d. 0.0001%

18. An input transducer converts

  • a. Voltage to current
  • b. Current to voltage
  • c. An electrical quantity to a nonelectrical quantity
  • d. A nonelectrical quantity to an electrical quantity

19. A thermistor converts

  • a. Light to resistance
  • b. Temperature to resistance
  • c. Voltage to sound
  • d. Current to voltage

20. When we trim a resistor, we are

  • a. Making a fine adjustment
  • b. Reducing its value
  • c. Increasing its value
  • d. Making a coarse adjustment

21. A D/A converter with four inputs has

  • a. Two outputs
  • b. Four outputs
  • c. Eight outputs
  • d. Sixteen outputs

22. An op amp with a rail-to-rail output

  • a. Has a current-boosted output
  • b. Can swing all the way to either supply voltage
  • c. Has a high output impedance
  • d. Cannot be less than 0 V.

23. When a JFET is used in an AGC circuit, it acts like a

  • a. Switch
  • b. Voltage-controlled current source
  • c. Voltage-controlled resistance
  • d. Capacitance

24. If an op amp has only a positive supply voltage, its output cannot

  • a. Be negative
  • b. Be zero
  • c. Equal the supply voltage
  • d. Be ac coupled

Check your work.

Complete List of MCQ in Electronic Principles by Albert Malvino

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