MCQ(Multiple Choice questions) on Op-Amp Practical Applications: Design Simulation and Implementation

1 point

1. Which of the following electrical characteristics is not exhibited by an ideal op-amp?

 Infinite voltage gain

 Infinite bandwidth

 Infinite output resistance

 Infinite slew rate

        2. An ideal op-amp requires infinite bandwidth because:

 Signals can be amplified without attenuation

 Output common-mode noise voltage is zero

 Output voltage occurs simultaneously with input voltage changes

 Output can drive infinite number of device

         3. The ideal op-amp has infinite voltage gain because

 To control the output voltage

 To obtain the finite output voltage

 To receive zero noise output voltage

 None of the mentioned

 4. Find the output voltage of an ideal op-amp. If V1 and V2 are the two input voltages, and A is the gain:

 V0= V1-V2

 V0= A×(V1-V2)

 V0= A×(V1+V2)

 V0= V1×V2

5. Which of the following is a differential type of amplifier?

 Isolation amplifier

 Instrumentation amplifier

 Negative feedback amplifier

 All the above

6. An amplifier has its FL and FH frequencies at 1000 Hz and 500 kHz respectively and an open loop gain of 200. A feedback network with a feedback factor (β) of 0.8 is connected to the amplifier. Find the new lower and upper cut off frequencies.
Note: FLf and FHf are lower and upper cut-off frequencies with feedback

  FLf = 100 Hz, FHf = 20 kHz

  FLf = 5 Hz, FHf = 20 MHz

  FLf = 6.2 Hz, FHf =80.5 MHz

  FLf = 10.9 Hz, FHf = 8.9 kHz

7. An op-amp with slew-rate 10 V/μs and gain of 40 dB. If this amplifier must faithfully amplify sinusoidal signals from dc to 20 kHz without introducing any slew rate induced distortion, then the input signal level must not exceed ___________.

 7.95 V

 12.95 V

 0.795 V

 7.95 mV

8. A tuned amplifier has peak output at 2 MHz and quality factor 50. The bandwidth and 3-dB frequencies shall be at what values respectively?

 40 kHz, 2.02 MHz, 1.98 MHz 

 40 kHz, 2.04 MHz, 1.96 MHz 

 800 kHz, 2.04 MHz, 1.96 MHz 

 80 kHz, 2.08 MHz, 1.92 MHz 

9. Calculate output voltage V0 for the circuit shown:

 15

 12

 21

 11

10. For the circuit given, if the CMRR of the operational amplifier is 40 dB, then the magnitude of the output voltage is:

 1V

 10V

 2V

 5V

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