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About the Electronics & Communication MCQ category
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61
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February 19, 2022
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In a horizontal-slot antenna, the polarization of the energy is radiated in what direction?
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52
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June 18, 2022
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In a frequency-sensitive antenna, the physical length of ___
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32
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June 18, 2022
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What is/are the basic type(s) of antenna array(s) in common use?
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36
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June 18, 2022
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In a delay-type lens, the amount of delay in the phase of the ___
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39
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June 18, 2022
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A lens antenna which accelerates some portion of ___
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32
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June 18, 2022
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In a lens antenna, what is the purpose of the collimating lens?
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30
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June 18, 2022
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The parabolic reflector is often used because it produces ___
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36
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June 18, 2022
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Radar range is determined as a function of which of the following measures?
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28
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June 18, 2022
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Surface angular measurements for antenna directivity in ___
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33
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June 18, 2022
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Directivity refers to which of the following properties of a radiated beam?
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32
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June 18, 2022
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A standing-wave ratio (swr) describes which of the following quantities?
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31
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June 18, 2022
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Power ratio is a term used to express what property of an antenna?
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33
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June 18, 2022
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The PIN diode begins acting as a variable resistance at what minimum frequency?
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41
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June 18, 2022
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A Schottky barrier diode has which of the following advantages over a ___
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31
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June 18, 2022
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In a point-contact diode, passing a large current from the catwhisker to the ___
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27
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June 18, 2022
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In an avalanche transit-time diode, what causes the ___
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29
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June 18, 2022
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Gallium-arsenide semiconductors begin to exhibit which of the ___micro
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25
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June 18, 2022
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Bulk-effect semiconductors have what primary advantage over normal pn junction semiconductors?
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31
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June 18, 2022
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In a nondegenerative parametric amplifier with a pump frequency of ___
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28
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June 18, 2022
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In a nondegenerative parametric amplifier, how does the pump frequency compare to ___
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92
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June 18, 2022
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How is amplification accomplished in the circuit?
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33
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June 18, 2022
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What is the most important feature of the parametric amplifier?
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66
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June 18, 2022
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Stability is a problem in which, if any, of the following tunnel-diode frequency converters?
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24
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June 18, 2022
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In the reflection-type, circulator-coupled tunnel-diode amplifier ___
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25
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June 18, 2022
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Tuning a tunnel-diode oscillator by changing the capacitance of ___
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29
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June 18, 2022
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The tuned circuit in a tunnel-diode oscillator determines which of the following circuit values?
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24
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June 18, 2022
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The tunneling action of the tunnel diode produces which of the following useful properties?
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29
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June 18, 2022
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The crossed-field amplifier produces which of the following desirable ___
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45
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June 16, 2022
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A magnetron should be "baked in" under which of the following conditions?
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33
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June 16, 2022
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