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Operational Amplifier Question & Answers

September 1, 2021 By Wat Electrical Leave a Comment

This article lists 100 Operational Amplifier MCQs for engineering students. All the Operational Amplifier Questions & Answers given below includes solution and link wherever possible to the relevant topic.

The basic task of the operational amplifier is to amplify the input signal. In the early days when digital computers were not evolved at that time the different mathematical functions like integration, subtraction, addition, and differentiation were performed using the operational amplifier.

So, just by connecting a few resistors and capacitors, it is possible to perform the different mathematical operations, that is why this amplifier is known as the operational amplifier. Most of the amplifiers consist of two power supplies the positive and the negative power supply.

1). How many input terminals does an operational amplifier have?
HintAn operational amplifier has two input terminals they are inverting and non-inverting terminals
2). If the input terminal of an op-amp is positive then that terminal is known as ____________
HintIf the input terminal of an op-amp is positive then that terminal is known as a non-inverting terminal
3). The operational amplifiers are used in __________
HintThe operational amplifiers are used in waveform converter, oscillator, active filters, etc
4). The ideal operational amplifiers slew rate should be equal to _______
HintThe ideal operational amplifiers slew rate should be equal to infinity
5). If the input terminal of an op-amp is negative then that terminal is known as ____________
HintIf the input terminal of an op-amp is negative then that terminal is known as inverting terminal
6). How many output terminals does an operational amplifier have?
HintAn operational amplifier has only one output terminal
7). What is the standard form of CMRR?
HintThe standard form of CMRR is Common Mode Rejection Ratio
8). For an ideal op-amp, the value of the common-mode rejection ratio should be equal to _______
HintFor an ideal op-amp, the value of the common-mode rejection ratio should be equal to infinity
9). Common mode rejection ratio is defined as a ratio of _________
HintCommon mode rejection ratio is defined as a ratio of differential gain/common mode
10). The ideal op-amp has _______
HintThe input impedance, open-loop gain, and the bandwidth in ideal operational amplifiers is infinite and it has zero output impedance and slew rate
11). Whenever the input is equal to zero in an ideal op-amp then at that time the output is equal to ________
HintWhenever the input is equal to zero in an ideal op-amp then at that time the output is equal to zero
12). The input impedance value of an op-amp 741 is _____________
HintThe input impedance value of an op-amp 741 is 2MΩ
13). The output impedance value of an op-amp 741 is _________
HintThe output impedance value of an op-amp 741 is 75MΩ
14). The feedback from output to the non-inverting input terminal is known as ___________
HintThe feedback from output to the non-inverting input terminal is known as positive feedback
15). The offset voltage value of an ideal op-amp 741 is _________
HintThe offset voltage value of an ideal op-amp 741 is 1mV
16). In how many ways we can apply input to an op-amp?
HintIn three ways we can apply input to an op-amp, by applying an input to both the Inverting & non-inverting terminals, only to inverting, and to the only non-inverting terminal
17). For general purpose op-amps, the value of the input bias current is in the range of ______
HintFor general purpose op-amps, the value of the input bias current is in the range of nano amperes, microamperes, and femto-amperes, but for high-speed op-amps, the range is micro amperes & Femto amperes for precise amplifiers
18). The CMRR value of an ideal op-amp 741 is _______
HintThe CMRR value of an ideal op-amp 741 is 70-90dB
19). The input bias current value of the LT6273 op-amp is in the range of ____
HintThe input bias current value of the LT6273 op-amp is in the range of micro- amperes
20). The input bias current value of the LM741 op-amp is in the range of ____
HintThe input bias current value of the LM741 op-amp is in the range of nano-amperes
21). The input bias current value of the AD549 op-amp is in the range of ____
HintThe input bias value of the AD549 op-amp is in the range of femto-amperes
22). The slew rate value of an ideal op-amp 741 is _______
HintThe slew rate value of an ideal op-amp 741 is 0.5V/µs
23). An op-amp is a _______
HintAn op-amp is a multistage amplifier, high gain differential amplifier, and performs mathematical operations
24). An operational amplifiers are categorized into ______
HintAn operational amplifiers are categorized into two types they are open loop and close loop op-amps
25). The feedback is provided in ____ op-amp
HintThe feedback is provided in close loop op-amp

Operational Amplifiers MCQs for Interviews

26). The slew rate value of an ideal op-amp LF411 is _______
HintThe slew rate value of an ideal op-amp LF411is 15V/µs
27). How many types of feedbacks are there in close loop op-amp?
HintThere are two types of feedbacks are there in close loop op-amp they are positive and negative feedback
28). __________ is an op-amp attribute
HintZero impedance is an op-amp attribute
29). ___________ are the op-amp input attributes
HintInfinite impedance, zero bias current, and response to differential voltages are the op-amp input attributes
30). _______ are the ideal op-amp attributes
Hintzero common-mode gain, zero bias current, and zero offset voltage are the ideal op-amp attributes
31). The slew rate value of an op-amp LM318 is _______
HintThe slew rate value of an op-amp LM318 is 70V/µs
32). How many pins does an op-amp 741 IC have?
HintAn op-amp 741 IC has eight pins
33). The input resistance value of an op-amp 741 IC is _______
HintThe input resistance value of an op-amp 741 IC is 1MΩ to 2MΩ
34). The offset voltage of an op-amp 741 is _________
HintThe offset voltage of an op-amp 741 is <10mV
35). The offset current of an op-amp 741 is _________
HintThe offset current of an op-amp 741 is 10nA
36). The slew rate value of an op-amp LM6364 is _______
HintThe slew rate value of an op-amp LM6364 is 300V/µs
37). The output resistance value of an op-amp 741 IC is ________
HintThe output resistance value of an op-amp 741 IC is 50Ω to 100Ω
38). The average of two currents that flow into inverting and non-inverting terminals of an op-amp is known as input __________
HintThe average of two currents that flow into inverting and non-inverting terminals of an op-amp is known as input bias current
39). The algebraic difference between the currents into an inverting and non-inverting terminal is known as _______
HintThe algebraic difference between the currents into inverting and non-inverting terminals is known as input offset current
40). In the feedback amplifier the negative feedback exit in how many ways?
HintIn feedback amplifier the negative feedback exit in four ways such as VCVS, ICVS, VCIS, and ICIS
41). The voltage-controlled voltage source is also known as ____________
HintThe voltage-controlled voltage source is also known as a voltage amplifier
42). ________ is an input in current-controlled voltage source amplifier
HintCurrent is input in current-controlled voltage source amplifier
43). A circuit that amplifies the difference between two signals is called ______ amplifier
HintA circuit that amplifies the difference between two signals is called the differential amplifier
44). ________ is a circuit that compares two input voltages
HintComparator is a circuit that compares two input voltages
45). A circuit that performs integration of input signals is known as _________
HintA circuit that performs the integration of input signals is known as an integrator
46). ________ is an output in a current-controlled voltage source amplifier
HintVoltage is an output in a current-controlled voltage source amplifier
47). The current-controlled voltage source amplifier is also known as ________
HintThe current-controlled voltage source amplifier is also known as a trans-resistance amplifier
48). A circuit that performs mathematical differentiation of an input signal is called a ________
HintA circuit that performs mathematical differentiation of an input signal is called a differentiator
49). When two input voltages are equal then the output of an op-amp should be equal to ________
HintWhen two input voltages are equal then the output of an op-amp should be equal to zero
50). An op-amp MAX4238 IC is _________
HintIn an op-amp MAX4238 IC the bandwidth and gain is high and the noise is low

Operational Amplifiers MCQs for Quiz

51). An op-amp IC MAX4238 provides current of _________
HintAn op-amp IC MAX4238 provides a current of 600µA
52). The voltage-controlled current source is also known as ___________
HintThe voltage-controlled current source is also known as a transconductance amplifier
53). The input offset current of an op-amp MAX4238 IC is ___________
HintThe input offset current of an op-amp MAX4238 IC is 2µV
54). ____________ are the applications of an op-amp MAX4238 IC
HintThe medical instruments, strain gauges, thermocouple, etc are the applications of an op-amp MAX4238 IC
55). ____________ are the applications of an op-amp OP07 IC
HintThe low VOS composite amplifier is the applications of an op-amp OP07 IC
56). The current-controlled current source amplifier is also known as ____________
HintThe current-controlled current source amplifier is also known as a current amplifier
57). How many pins does an op-amp IC OP07 have?
HintAn op-amp IC OP07 has eight pins
58). An op-amp OP07 IC has voltage gain of _________
HintAn op-amp OP07 IC has voltage gain of 450V/mV
59). The output resistance value of an op-amp OP07 IC is __________
HintThe output resistance value of an op-amp OP07 IC is 60Ω
60). The bandwidth of an op-amp OP07 IC is __________
HintThe bandwidth of an op-amp OP07 IC is 0.6MHz
61). The slew rate of an op-amp MAX4238 IC is __________
HintThe slew rate of an op-amp MAX4238 IC is 0.35 V/µs
62). The maximum voltage supply of an op-amp MAX4238 IC is _____
HintThe maximum voltage supply of an op-amp MAX4238 IC is 6V
63). The operating temperature range of an IC OP07 is ___________
HintThe operating temperature range of an IC OP07 is -40 to 85 deg
64). The slew rate of an op-amp OP07 IC is __________
HintThe slew rate of an op-amp OP07 IC is 0.3 V/µs
65). The CMRR value of an op-amp OP07 IC is __________
HintThe CMRR value of an op-amp OP07 IC is 106dB max
66). In common mode the input resistance of an op-amp OP07 IC is ____________
HintIn common mode the input resistance of an op-amp OP07 IC is 50Ω
67). The CMRR value of an op-amp IC MAX4238 is _________
HintThe CMRR value of an op-amp IC MAX4238 is 140dB
68). The bandwidth of an op-amp IC MAX4238 is _________
HintThe bandwidth of an op-amp IC MAX4238 is 1MHz
69). In differential mode the input resistance value of an op-amp OP07 IC is __________
HintIn differential mode the input resistance value of an op-amp OP07 IC is 160GΩ
70). ____________ are the applications of an op-amp IC NE5532
HintThe applications of an op-amp IC NE5532 are audio mixer, high-performance audio preamplifiers, av receivers, etc
71). How many pins does an op-amp IC TL074C have?
HintAn op-amp IC TL074C has 14 pins
72). The low offset voltage of an op-amp MAX4238 is _________
HintThe low offset voltage of an op-amp MAX4238 is 2µV
73). _____________ are the applications of an op-amp IC TL074
HintSquare wave oscillator, oscillators, high-q notch filter are the applications of an op-amp IC TL074
74). An op-amp IC uA709M is a _______
HintAn op-amp IC uA709M is a mono amplifier
75). Which IC is a bipolar op-amp?
HintIC 741 & IC NE531 are bipolar op-amps

Operational Amplifiers MCQs With Hints

76). Which IC is a MOSFET op-amp?
HintIC CA3140E is a MOSFET op-amp
77). ________ is a type of JFET op-amp
HintIC TL081 is a type of JFET op-amp
78). For an ideal op-amp the voltage gain value is _________
HintFor an ideal op-amp the voltage gain value is infinity
79). For a low noise 5534 op-amp the output impedance value is _____________
HintFor a low noise 5534 op-amp the output impedance value is 0.3Ω
80). The large signal voltage gain of an op-amp IC 741 is ___________
HintThe large signal voltage gain of an op-amp IC 741 is 50 dB to 106dB
81). The large signal voltage gain of an op-amp IC TLC271 is ___________
HintThe large signal voltage gain of an op-amp IC TLC271is 74 dB to 93dB
82). The large signal voltage gain of an op-amp IC LMC660 is ___________
HintThe large signal voltage gain of an op-amp IC LMC660 is 92 dB to 126dB
83). How many types of gains are there in op-amps?
HintThere are four types of gains are there in op-amps they are voltage gain, current gain, trans-conductance gain, and trans-resistance gain
84). ________ are the requirements for op-amp
HintAn offset nulling, feedback, strobing, or phase compensation are the requirements for op-amp
85). __________ are the specifications of an audio power amplifier
HintThe maximum output power, frequency response, noise, distortion are the specifications of an audio power amplifier
Read more about Amplifiers
86). The frequency range of an op-amp is from _________
HintThe frequency range of an op-amp is from 0Hz to 1MHz
87). The applications of an IC LM358N are _________
HintThe applications of an IC LM358N are PLCs, active filters, and uninterruptible power supply
88). _____________ are the applications of an IC LM1458
HintThe portable devices, summing amplifiers, integrators, comparators are the applications of an IC LM1458
89). The max voltage supply of an op-amp LM1458 IC is _________
HintThe max voltage supply of an op-amp LM1458 IC is ±18V
90). The MOSFET op-amp CA3130E supply ________ current
HintThe MOSFET op-amp CA3130E supplies 1.8mA current
91). The input voltage of the MOSFET op-amp s around ________
HintThe input voltage of the MOSFET op-amp s around 8mv
92). The voltage gain of the JFET op-amp LF351 is _________
HintThe voltage gain of the JFET op-amp LF351 is 88dB
93). The slew rate of JFET op-amp LF441 IC is __________
HintThe slew rate of JFET op-amp LF441 IC is 15 V/µs
94). An IC LM7171 useful as an _______
HintAn IC LM7171 useful as an instrumentation amplifier and it has a high gain CMRR
95). The gain-bandwidth product of an op-amp FHP3130 is ________
HintThe gain-bandwidth product of an op-amp FHP3130 is 60MHz
96). The gain-bandwidth product of an op-amp OPA369 is ________
HintThe gain-bandwidth product of an op-amp OPA369is 0.012MHz
97). An op-amp FHP3350 is used as___________
HintAn op-amp FHP3350 is used as a video amplifier and it has high speed
98). Which one is a Quad operational amplifier?
HintIC AD8567 is a Quad operational amplifier
99). Which one is a dual operational amplifier?
HintIC AD8034 is a dual operational amplifier
100). Who invented the operational amplifier?
HintThe operational amplifier invented by Karl D. Swartzel
Read more about Operational Amplifiers
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