Electronic Analog Circuits Multiple Choice Questions

Electronics and Communication Multiple Choice Questions

1. An Op-Amp clamper?

a. removes part of the output voltage above a given level

b. converts the input voltage into square wave voltage at a given level

c. clamps the output voltage at a given level

d. removes part of output voltage below a given below

2. Positive half wave rectifier using Op-Amp is generally used to rectify signal of the order of?

a. Kilovolts

b. hundreds of volt

c. tens of volts

d. millivolts

3. An Op-Amp Schmitt trigger is basically?

a. An OP-amp comparator with negative feedback

b. An Op-Amp comparator with positive feedback

c. a triangle wave generator

d. a pulse generator

4. An Op-Amp comparator?

a. is always non-inverting type

b. is always inverting type

c. is always a combination of an inverting Op-Amp and a non-inverting Op-Amp

d. may be inverting type or non-inverting type

5. The best circuit used to eliminate power frequency (50 Hz) hum is?

a. a scratch filter

b. a speech filter

c. an octave filter

d. a rumble filter

6. An Op-Amp circuit capable of selecting sound from one out of two speaker or both is known as?

a. a crossover network

b. a tone control

c. a panning control

d. a octave equalizer

7. Which of the following Op-Amp system is non-linear?

a. voltage to current converter

b. voltage follower

c. active filter

d. sample and hold circuit

8. A cascade amplifier uses?

a. two stages of CE amplifier

b. direct coupled CE-CC circuit

c. direct coupled CE-CB circuit

d. direct coupled CC-CB circuit

9. Typical output offset voltage and input offset current of an Op-Amp is?

a. 1 mV, 10 mA

b. 1 mV, 10 nA

c. 10 mV, 10 nA

d. 10 mV, 10 mA

10. An Op-Amp has a gain of 50 and bandwidth of 100KHz. Its unit-gain frequency is?

a. 5 MHz

b. 100 KHz

c. 10 MHz

d.  2.5 MHz

Answers:

1. c

2. d

3. b

4. b

5. d

6. c

7. d

8. c

9. c

10. a

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