Envelope Detector MCQ’s

This set of Analog Communication Multiple Choice Questions & Answers (MCQs) focuses on “Envelope Detector”.

1. Effective radiated power (ERP) is equal to ________
a) Pt×Gt×Pd
b) Pt×Pd
c) Gt×Pd
d) Pt×Gt

2. Power density from an isotropic antenna is equal to ________
a) Pt4πR2
b) Pc4πR2
c) Pt2πR2
d) Pt4πR

3. Envelope Detector is a/an ________
a) Coherent detector
b) Asynchronous Detector
c) Synchronous Detector
d) Product Demodulator

4. Compact discs mainly use ________
a) optical recording
b) magnetic recording
c) magnetic retrieval
d) both optical and magnetic recording

5. Power density follows inverse square law.
a) True
b) False

6. Helical antenna is circularly polarized.
a) True
b) False

7. If the distance between antenna and source doubles, the received signal power decreases by 14.
a) True
b) False

8. There is no requirement of IF amplifier stages for a video monitor.
a) True
b) False

9. The intermediate frequency of a superheterodyne receiver is 500KHz. What is the image frequency at 1200KHz?
a) 600KHz
b) 500KHz
c) 700KHz
d) 200KHz

10. Which of these amplifiers is used for impedance matching?
a) Common Base
b) Common Emitter
c) Common Collector
d) Common Base & Emitter

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