Multiple Choice Questions Topic Outline
- MCQs in Microelectronics
- MCQs in Integrated Circuits components
- MCQs in Characteristics and products (ICs)
- MCQs in Operational Amplifiers
- MCQs in Multivibrators
The Series
Following is the list of multiple choice questions in this brand new series:
Start Practice Exam Test Questions Part 1 of the Series
1. The integrated circuit was invented at Texas instrument in 1958 by
- A. Jonathan Kurtz
- B. James Faug
- C. Jack Kilby
- D. Harold Lanche
2. Which component cannot be fabricated into ICs?
- A. Diode
- B. Resistor
- C. Inductor
- D. Transistor
3. What is the purpose of a comparator in op-amps?
- A. To detect the occurrence of a changing input voltage
- B. To maintain a constant output when the dc input voltage changes
- C. To produce change in output when an input voltage equals a reference voltage
- D. To amplify an input voltage
4. The op-amp comparator circuit uses
- A. Negative feedback
- B. A resistor
- C. Positive feedback
- D. No feedback
5. What is a complete electronic circuit, containing transistors, diodes, resistors and capacitors processed on and contained entirely within a single chip of silicon?
- A. Integrated circuit (IC)
- B. Monolithic IC
- C. Linear IC
- D. Digital IC
6. What process is used to produce IC semiconductor elements?
- A. Alloy junction
- B. Mesa diffusion
- C. Grown diffusion
- D. Planar diffusion
7. Which integrated circuit is having more than 1000 gates?
- A. Small-scale integration (SSI)
- B. Medium-scale integration (MSI)
- C. Large-scale integration (LSI)
- D. Very large-scale integration (VLSI)
8. What characteristic does not apply to an op-amp?
- A. Low power
- B. High gain
- C. High input impedance
- D. Low output impedance
9. An integrator op-amp uses what element in the feedback path?
- A. Capacitor
- B. Resistor
- C. Inductor
- D. Transistor
10. Which integrated circuit is having more that 100 gates?
- A. Small-scale integration (SSI)
- B. Medium-scale integration (MSI)
- C. Large-scale integration (LSI)
- D. Very large-scale integration (VLSI)
11. Which of the choices below are sources of output offset voltage?
- A. The difference in VBE values
- B. The difference in VCE values
- C. The difference in transistor voltage
- D. All of the choices
12. The voltage gain of differential amplifier
- A. Equals the AC collector resistance divided by two times the AC resistance of the emitter diode
- B. Is the sum of two emitter currents
- C. Equals the difference between two base currents
- D. Is half of either collector current
13. Which integrated circuit is having 10 to 100 gates?
- A. Small-scale integration (SSI)
- B. Medium-scale integration (MSI)
- C. Large-scale integration (LSI)
- D. Very large-scale integration (VLSI)
14. Integrated circuits having up to 9 gates is called
- A. Small-scale integration (SSI)
- B. Medium-scale integration (MSI)
- C. Large-scale integration (LSI)
- D. Very large-scale integration (VLSI)
15. What is VCO
- A. Exhibits a frequency that can be varied with a dc control voltage
- B. A single pole low pass filter
- C. Is the terminal of the op-amp where input resistors are placed
- D. All of the choices
16. The reason why integrated circuits are divided into digital linear categories is because
- A. They either process analog or digital signals
- B. They are either used as input of output components
- C. Up to the present these are the only two known categories
- D. They are simply circuits that happen to be constructed integrally and like all circuits are either switching type or amplifying type
17. How is the output of a differentiator related to the input in an op-amp?
- A. The output of a differentiator is proportional to the rate of change of the input
- B. The output of a differentiator is inversely proportional to the rate of change of the input
- C. The two parameters are not related
- D. The two parameters are always equal to each other
18. ICs have advantages over discrete device circuits which is
- A. Lower cost
- B. High reliability
- C. Smaller size
- D. All of the above
19. Dual-in-line pick up (DIP) is the most popular IC package because
- A. It is low in cost
- B. It is one of the tiniest package known
- C. It ruggedly resist vibration due to its solid construction
- D. All of the above
20. What is the typical input resistance of the op-amp amplifier when measured under open loop?
- A. 2 MΩ
- B. 3 MΩ
- C. 1.5 MΩ
- D. 2.5 MΩ
21. After assembly, the ICs are tested and classified as either
- A. Military
- B. Industrial
- C. Military or industrial
- D. Military and industrial
22. For a constant input voltage to an integrator, why is the voltage across the capacitor linear?
- A. Capacitor diode does not dissipate heat
- B. Capacitor current is constantly changing
- C. Capacitor current is linear
- D. Capacitor current is constant
23. Upon what principle does a relaxation oscillator operate?
- A. Resistor in cascade
- B. The charging and discharging of capacitor
- C. The rectification process of a diode
- D. Switching transistors
24. ICs for military and space applications are tested in the temperature range of
- A. 0ºC to +70 ºC
- B. -55 ºC to +125 ºC
- C. -173 ºC to + 100 ºC
- D. -10 ºC to + 25 ºC
25. For most commercial and industrial operations, ICs are tested in the temperature range of
- A. 0ºC to +70 ºC
- B. -55 ºC to +125 ºC
- C. -173 ºC to + 100 ºC
- D. -10 ºC to + 25 ºC
26. An IC op-amp that combines FETs and bipolar transistors.
- A. BIFET
- B. MOSFET
- C. CMOS
- D. IGFET
27. A mass of metal attached to the case of a transistor to allow the heat to escape more easily.
- A. Flag
- B. Heat sink
- C. Op-amp
- D. Photodiode
28. Which of the following IC processes digital signals?
- A. Digital IC
- B. Discrete IC
- C. Linear IC
- D. Monolithic IC
29. Which of the following IC processes analog signals?
- A. Digital IC
- B. Discrete IC
- C. Linear IC
- D. Monolithic IC
30. A signal that is applied with equal strength to both inputs of a differential amplifier or an op-amp.
- A. Common-emitter circuit
- B. Common-ration signal
- C. CMRR
- D. Common mode signal
31. A base circuit that a designer can modify to get more advanced circuits
- A. Experimental
- B. Prototype
- C. Peak detector
- D. Loading
32. What is the most commonly used type of linear IC?
- A. 741
- B. 555 timer
- C. Operational amplifier
- D. LM 340
33. What has been considered as the industry standard of linear ICs?
- A. 555 timer
- B. 741 op amp
- C. LM 340
- D. LM 317
34. What type of response characterizes the single pole low pass filter?
- A. Flat from dc to the critical frequency
- B. Current downward up to the maximum frequency
- C. Curved upward to the maximum frequency
- D. No response characteristics
35. Which of the item below is an advantage of a shunt regulator over a series type?
- A. Has an inherent current limiting
- B. Efficient than series regulator because of its component used
- C. A non regulating device
- D. None of the choices
36. What is the most popular IC used in timing circuits?
- A. 555 timer
- B. 741
- C. LM 317
- D. LM 340
37. What is the typical total power dissipated by the operational amplifier?
- A. 5 mW
- B. 0.5 mW
- C. 50 mW
- D. 500 mW
38. In the standard letter-number identification code of operational amplifiers, the letter prefix which normally consists of two or three letters identifies the
- A. Manufacturer
- B. Type of packaging
- C. Type of op-amp
- D. Temperature range of operation
39. An op-amp circuit that has its output tied directly to the inverting input terminal is called a ________________
- A. Current follower
- B. Inverting amplifier
- C. Non-inverting amplifier
- D. Voltage follower
40. Most op-amps circuit use
- A. Positive feedback
- B. Negative feedback
- C. Open-loop operation
- D. Closed-loop operation
41. The three most common package suffix codes are the following except one
- A. A
- B. D
- C. J
- D. N
42. What is the package suffix code for a plastic dual-in-line for surface mounting on PC board?
- A. D
- B. J
- C. N
- D. P
43. What is the approximate short circuit current output of 741 op amp?
- A. 15 mA
- B. 25 mA
- C. 30 mA
- D. 35 mA
44. A circuit whose components are soldered or otherwise connected mechanically
- A. Discrete circuit
- B. Non discrete circuit
- C. Biasing circuit
- D. Integrated circuit
45. MPP value in an op-amp is synonymous with
- A. Output voltage swing
- B. Equal to the difference of the two supply voltages
- C. The maximum unclipped peak-to-peak output of an amplifier
- D. All of the choices
46. What is the highest undistorted frequency out of an op-amp for a given slew rate and peak voltage?
- A. Power bandwidth
- B. Cut-off frequency
- C. Critical frequency
- D. 3-dB bandwidth
47. What is the summing point in op-amps?
- A. Simulates mathematical integration
- B. Acts as a scaling differentiator
- C. Determines the rate of change of the integrator output voltage
- D. A terminal of the op-amp where the input resistors are commonly connected
48. In terms of circuit components, what does the term pole refer to?
- A. A single RL circuit
- B. A single RC circuit
- C. A cascaded amplifier
- D. A summing amplifier
49. What is the slew rate of a 741 operational amplifier?
- A. 0.5 V/µs
- B. 1 V/µs
- C. 0.5 V/ms
- D. 1 V/ms
50. What specification of an operational amplifier which tells how fast the output voltage can change?
- A. Frequency response
- B. Common mode rejection ration
- C. Slew rate
- D. Open-loop voltage gain
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