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
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
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
Explanation: Tuned FM detector act as a slope detector which detects slope of characteristic.
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
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
Explanation: Single tuned circuits are used for narrow band operation since it has very small linear frequency range.
6. Foster-seely detector is ___________
a) AM detector
b) FM detector
c) AM demodulator
d) None of the mentioned
View Answer
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
Explanation: Foster-seely detector is used where a carrier wave has a frequency greater than 1MHz.
8. PLL stands for _____________________
a) Phase loaded loop
b) Phase least loop
c) Phase locked loop
d) None of the mentioned
View Answer
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
Explanation: PLL is a negative feedback system with voltage controlled oscillator in the feedback path.
10. Phase sensitive detector is used as _____________
a) Peak detector
b) Error detector
c) Threshold detector
d) Phase detector
View Answer
Explanation: Phase sensitive detector is used as error detector.
Sanfoundry Global Education & Learning Series – Instrumentation Transducers.
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