A notch filter is sometimes used in communication receivers to
Answer: A
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An unmodulated voltage 10 V effective is applied to a dioxide detector in which load resistance is 4 x 10-5 ohms. A micrometer shows that the rectified DC current in this resistance is 30 A. The input resistance of the detector is
Answer: B
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Modulated carrier power in FM
Answer: C
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Which of the following produces upper and lower side frequencies?
Answer: A
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In a superheterodyne receiver
Answer: A
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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
Answer: C
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In a superheterodyne receiver, the IF stage has better selectivity than RF stage because
Answer: D
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In a transistor receiver, the use of FET as the first stage amplifier is likely to
Answer: C
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Transistor are free from which type of noise?
Answer: B
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In an FM signal, the power
Answer: D
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