DC and AC Amplifiers MCQ’s

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This set of Linear Integrated Circuits Multiple Choice Questions & Answers (MCQs) focuses on “DC and AC Amplifiers”.

1. Find the DC differential amplifier with offset null circuitry?
a)
Find the DC differential amplifier with offset null circuitry
b)
Find the differential inputs of the DC amplifier
c)
DC differential amplifier with offset null circuitry when a DC voltage is applied to inputs
d)
Find the DC voltage from the given diagram

2. Why DC amplifier uses offset null circuitry?
a) To reduce the distortion in output
b) To improve the accuracy of amplifier
c) To get large output gain
d) All of the mentioned

3. An inverting amplifier that amplifies dc input level is called
a) DC and AC amplifier
b) AC amplifier
c) DC amplifier
d) None of the mentioned

4. Why are coupling capacitor used in audio receiver system?
a) All of the mentioned
b) Thermal drift
c) Component tolerance
d) Variation in signal

5. Determine the bandwidth of the AC inverting amplifier for high cut-off frequency of 15 Hz?

a) 4.321Hz
b) 8.356Hz
c) 7.056Hz
d) 2.334Hz

6. State the application in which summing, scaling or averaging amplifiers are used?
a) Multiplexers
b) Counters
c) Audio mixers
d) All of the mentioned

7. Find the AC inverting amplifier from the circuits given below?
a)
AC amplifier with external offset voltage compensating network
b)
Find the non-inverting input terminal of the amplifier from the given diagram
c)
Find the AC inverting amplifier from the given circuit
d)
Find the external offset voltage from the given circuit

8. When does the offset voltage compensating network must be used in inverting configuration?
a) When the input is AC voltage
b) When the input is DC voltage
c) When the input is either AC or DC voltage
d) None of the mentioned

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