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Receiver (radio): Quiz


Question 1: The detector was constructed so that the wire contact could be moved to different points on the crystal, and thereby obtain the best point for ________ the signal and the best detection.
Vacuum tubeRectifierHigh-voltage direct currentDiode

Question 2: An American named ________, a competitor to Marconi, set about to develop receiver technology that did not infringe any patents to which Marconi had access.
Frank ConradErnst AlexandersonEdwin Howard ArmstrongLee De Forest

Question 3: One of the first areas in which valves were used was in the manufacture of ________ repeaters, and although the performance was poor, they gave significant improvement in long distance telephone receiving circuits.
Telephone exchangeTelephone related articlesAlexander Graham BellTelephone

Question 4: Portable radios include simple ________ that are typically monoaural and receive the AM, FM, and/or short wave broadcast bands.
Transistor radioSonyTR-55Integrated circuit

Question 5: The first person to use the device to detect radio waves was a Frenchman named Edouard Branly, and ________ popularised it when he gave a lecture in 1898 in honour of Hertz.
Nikola TeslaUniversity College LondonImperial College LondonOliver Joseph Lodge

Question 6: Some modern integrated receivers can send audio out to seven loudspeakers and an additional channel for a subwoofer and often include connections for ________.
HeadphonesSound recording and reproductionMicrophoneHeadset (telephone/computer)

Question 7: However by the early 1960s portable transistor broadcast receivers (________) were hitting the market place.
Transistor radioSonyIntegrated circuitTR-55

Question 8: Also the ability of synthesizers to be controlled by ________ meant that many new facilities could be introduced apart from the significant performance improvements offered by synthesizers.
Reduced instruction set computerMicroprocessor64-bitCentral processing unit

Question 9: With the outbreak of the ________, there was a great impetus to develop radio receiving technology further.
Armenian GenocideWestern Front (World War I)World War ICaucasus Campaign

Question 10: Working for the ________ in Europe during 1918, Armstrong thought that if the incoming signals was mixed with a variable frequency oscillator (the "local oscillator"), a lower-frequency fixed tuned amplifier could be used.
American Expeditionary ForceRomania during World War IBrazil during World War IPersian Campaign


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