Radio Receivers Questions

• In a radio receiver with simple AGC
• In a superheterodyne receiver, the IF is 455 kHz. If it is tuned to 1200 kHz, the image frequency will be
• 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
• Noise generated in a resistor is also known as
• The function of an AM detector circuit is to
• Which of the following is same in AM and FM receivers?
• In a radio receiver, if the intermediate frequency is too low
• In a broadcast superheterodyne receiver
• If the intermediate frequency of a superheterodyne receiver falls within the tuning range of the receiver
• Which of the following oscillator is generally not used at VHF?
• In a radio receiver, if the intermediate frequency is too high
• A duplexer is a device used to
• The sensitivity curve of a standard receiver is represented by
• In a superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
• 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
• RF amplifiers are used in radio receivers for
• Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?
• The output of a diode detector contains
• A heterodyne frequency changer is called a
• Modulated carrier power in FM