Radio Receivers problems
- 1. In a radio receiver
Options- A. all stages contribute equally to noise
- B. RF stage has no effect on S/N ratio
- C. mixer stage contributes most of the noise generated Discuss
Correct Answer: mixer stage contributes most of the noise generated
- 2. Which of the following produces upper and lower side frequencies?
Options- A. Microphone
- B. Demodulator in a superheterodyne receiver
- C. Modulator in a. radio transmitter
- D. Oscillator in a receiver Discuss
Correct Answer: Microphone
- 3. In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 1000 kHz will be
Options- A. 1010 kHz
- B. 1455 kHz
- C. 1910 kHz
- D. 545 kHz Discuss
Correct Answer: 1910 kHz
- 4. A receiver having poor IF selectivity will also have poor
Options- A. sensitivity
- B. double spotting
- C. blocking
- D. all of the above Discuss
Correct Answer: blocking
- 5. The typical squelch circuit
Options- A. cuts off an IF amplifier when the AGC is maximum
- B. cuts off an IF amplifier when the AGC is minimum
- C. cuts off an audio amplifier when the carrier is absent
- D. eliminates the RF interference when the signal is weak Discuss
Correct Answer: cuts off an audio amplifier when the carrier is absent
- 6. Most of the amplification of the received signal is obtained in a superheterodyne receiver from the
Options- A. IF stage
- B. RF stage
- C. power amplification stage
- D. none of the above Discuss
Correct Answer: IF stage
- 7. The household radio receiver uses
Options- A. synchronous
- B. envelope detector
- C. radio detector
- D. none of the above Discuss
Correct Answer: envelope detector
- 8. Superheterodyne receiver can be used in
Options- A. AM
- B. FM
- C. SSB
- D. All of the above Discuss
Correct Answer: All of the above
- 9. A low ratio of the A.C. load impedance of a diode detector results in
Options- A. diagonal clipping
- B. poor AGC operation
- C. poor AF response
- D. negative peak clipping Discuss
Correct Answer: negative peak clipping
- 10. Vividh Bharati programme is transmitted in
Options- A. short wave
- B. medium frequency
- C. very high frequency
- D. all of the above Discuss
Correct Answer: medium frequency
More in Electronics and Communication Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.