Instrumentation Transducers Questions and Answers- Analog Demodulators

This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Analog Demodulators”.

1. Demodulation is the process of _____________
a) Extraction of analog signal
b) Multiplication with carrier wave
c) Extraction of carrier wave
d) None of the mentioned
View Answer

Answer: a
Explanation: Demodulation is the process of extraction of the analog signal.

2. Discriminators are also known as _____________
a) Modulators
b) Demodulator
c) Converters
d) Incriminators
View Answer

Answer: b
Explanation: Demodulators are also known as discriminators.

3. Which of the following act as a slope detector?
a) FM detector
b) Tuned FM detector
c) AM detector
d) Tuned AM detector
View Answer

Answer: b
Explanation: Tuned FM detector act as a slope detector which detects slope of characteristic.
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4. Which of the following circuit limit amplitude in FM signal?
a) Amplitude limiter
b) Amplitude controller
c) Amplitude magnifier
d) None of the mentioned
View Answer

Answer: a
Explanation: Amplitude limiter circuit limit amplitude of the FM signal.

5. Single tuned circuit is used for _______________
a) Narrow band operation
b) Wide band operation
c) Specific band operation
d) None of the mentioned
View Answer

Answer: a
Explanation: Single tuned circuits are used for narrow band operation since it has very small linear frequency range.
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6. Foster-seely detector is ___________
a) AM detector
b) FM detector
c) AM demodulator
d) None of the mentioned
View Answer

Answer: b
Explanation: Foster-seely detector is Frequency Modulator detector.

7. Foster-seely detector is used for carrier frequency____________
a) Below 1 KHz
b) Below 1MHz
c) Above 1MHz
d) Above 5MHz
View Answer

Answer: c
Explanation: Foster-seely detector is used where a carrier wave has a frequency greater than 1MHz.
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8. PLL stands for _____________________
a) Phase loaded loop
b) Phase least loop
c) Phase locked loop
d) None of the mentioned
View Answer

Answer: c
Explanation: PLL is the short form of Phase Locked Loop.

9. PLL is a ______________
a) Negative feedback system
b) Positive feedback system
c) Open loop system
d) None of the mentioned
View Answer

Answer: a
Explanation: PLL is a negative feedback system with voltage controlled oscillator in the feedback path.
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10. Phase sensitive detector is used as _____________
a) Peak detector
b) Error detector
c) Threshold detector
d) Phase detector
View Answer

Answer: b
Explanation: Phase sensitive detector is used as error detector.

Sanfoundry Global Education & Learning Series – Instrumentation Transducers.

To practice all areas of Instrumentation Transducers, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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