Electronics and Instrumentation General Knowledge Quiz | Electronics and Instrumentation General Knowledge Multiple Choice Questions(MCQs) with Answers

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Questions
61 ___________ amplifier is used to drive the recorder.
A Power amplifier
B Pre amplifier
C Operational amplifier
D Differential amplifier

Answer: Power amplifier
62 When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________
A Input amplification
B Input differentiation
C Common mode rejection
D Input isolation

Answer: Input isolation
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63 A chopper amplifier
A Converts AC signal from low frequency to high frequency
B Converts DC signal from low frequency to high frequency
C Converts AC signal from low frequency to DC high frequency
D Converts DC signal from low frequency to high frequency

Answer: Converts DC signal from low frequency to high frequency
64 Pre amplifier isolation in ECG circuit is to
A Increase input impedance
B Decrease input impedance
C Increase output impedance
D Decrease output impedance

Answer: Increase input impedance
65 Raising input impedance of pre amplifier reduces
A Input current
B Output current
C Stray current
D Grid current

Answer: Stray current
66 Common mode rejection ratio is defined as ratio of
A Common mode gain to differential mode gain
B Differential mode gain to common mode gain
C Common mode gain at input to differential mode gain at input
D Common mode gain at output to differential mode gain at output

Answer: Differential mode gain to common mode gain
67 An electrometer amplifier has high input impedance of
A 1015?
B 1020?
C 105?
D 1010?

Answer: 1015?
68 When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in
A Common mode
B Differential mode
C Non inverting mode
D Inverting mode

Answer: Non inverting mode
69 When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in
A Inverting mode
B Single ended mode
C Differential mode
D Non inverting mode

Answer: Single ended mode
70 The negative feed back in an amplifier
A Reduces voltage gain
B Increases the voltage gain
C Increases the gain band width product
D Reduces the input impedances

Answer: Reduces voltage gain
71 Feedback in an amplifier always helps in
A Controlling its output
B Stabilizes its gain
C Increasing its input impedance
D Increasing its gain

Answer: Controlling its output
72 Using mechanical chopper we cannot achieve high chopping rates due to their
A Inertia
B Response time
C Input impedance
D Output impedance

Answer: Inertia
73 The CMRR of a typical IC OPAMP is
A 80 dB
B 75 dB
C 70 dB
D 85 dB

Answer: 80 dB
74 A ————– is usually a display device used to produce a paper record of analog wave form.
A Graphic pen recorder
B Electron microscope
C X-Y recorder
D Oscilloscope

Answer: Graphic pen recorder
75 The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace.
A Accuracy
B Linearity
C Sensitivity
D Resolution

Answer: Sensitivity
76 A recorder is said to have good frequency response when the sensitivity of the system is _________ for all frequencies present in the signal.
A Constant
B Infinity
C Unity
D Zero

Answer: Constant
77 In phase response of a recorder noise level ___________ with the band width of a system
A Increases
B Reaches infinity
C Decreases
D Reaches unity

Answer: Increases
78 Stress and strain curves are plotted using
A Magnetic tape recording
B X-Y recording
C Galvanometric
D PMMC writing systems

Answer: X-Y recording
79 The writing speed of fast storage oscilloscope is
A 2000 cm/?s
B 1000 cm/?s
C 1500 cm/?s
D 2500 cm/?s

Answer: 2000 cm/?s
80 Storage oscilloscope operates on the principle of
A Primary emission
B Deflection
C Secondary emission
D Diffusion

Answer: Secondary emission

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