Exercise: Radio Receivers

Questions for: Radio Receivers

Noise generated in a resistor is also known as
A:
partition noise
B:
white noise
C:
thermal noise
D:
shot noise
Answer: C
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Which of the following noise does not occur in transistors?
A:
Partition noise
B:
Shot noise
C:
Flicker noise
D:
Resistance noise
Answer: A
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The output of a diode detector contains
A:
D.C. voltage
B:
modulating signal
C:
RF ripple
D:
all of the above
Answer: D
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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
A:
114 kW
B:
336 kW
C:
384 kW
D:
455 kW
Answer: B
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Which of the following oscillator is generally not used at VHF?
A:
Colpitts oscillator
B:
Clapp oscillator
C:
Armstrong oscillator
D:
Ultra Audio oscillator
Answer: C
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