Q. 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 25 MHz will be

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Q. In a communication system, noise is most likely to affect the signal

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Q. The noise produced by a resistor is proportional to

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Q. In a radio receiver, if the intermediate frequency is too high

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Q. In a receiver, which of the following device has IF input but RF output?

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Q. Transistor are free from which type of noise?

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Q. Standard AM radio broadcasts are confined to

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Q. In a radio receiver with simple AGC

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Q. Which of the following cannot be used to demodulate SSB?

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Q. In a broadcast superheterodyne receiver

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Q. A duplexer is a device used to

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Q. A heterodyne frequency changer is called a

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Q. RF amplifiers are used in radio receivers for

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Q. 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

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Q. The output of a diode detector contains

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Q. Which of the following noise does not occur in transistors?

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Q. Noise generated in a resistor is also known as

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Q. Which of the following is used to provide tracking between RF amplifier and local oscillator stages of receiver?

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Q. The noise generated by a resistor depends upon

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Q. In a superheterodyne receiver

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