MCQ 11 MarkDistance of communication satellite from the surface of the earth :✓36000 kmB36000 mileC3600 kmD36000 metreAnswerCorrect option: A. 36000 kmAView full question & answer→
MCQ 21 MarkThe device which works of both modulation and demodulation is called :ALaserBRadar✓ModemDFaxAnswerCorrect option: C. ModemCView full question & answer→
MCQ 31 MarkAttenuation is measured in :Aohm✓decibelCmhoDsiemenAnswerCorrect option: B. decibelBView full question & answer→
MCQ 41 MarkMeaning of "FAX" is :AFull Access Transmission✓Facsimile telegraphyCFactual Auto AccessDFeed Auto ExchangeAnswerCorrect option: B. Facsimile telegraphyBView full question & answer→
MCQ 51 MarkThe height of a T.V. transmission tower at any place on the surface of the earth is 245 m. The maximum distance upto which transmission of tower will reach is :A245 mB245 km✓56 kmD112 kmAnswerCorrect option: C. 56 kmCView full question & answer→
MCQ 61 MarkWhich of the following frequency ranges is used in T.V. broadcasting :A30 Hz-300 HzB30 kHz - 300 kHz✓30 MHz - 300 MHzD30 GHz - 300 GHzAnswerCorrect option: C. 30 MHz - 300 MHzCView full question & answer→
MCQ 71 MarkThe value of amplitude modulation index is :Aalways zeroBbetween 1 and $\infty$✓between 0 and 1Dalways $\infty$AnswerCorrect option: C. between 0 and 1CView full question & answer→
MCQ 81 MarkWith the modulation of carrier wave frequency $f_{c}$ audio wave frequency $f_{m}$ the received band width is :A$2f_{c}$✓$2f_{m}$C$f_{c}+f_{m}$D$(f_{c}+f_{m})$AnswerCorrect option: B. $2f_{m}$BView full question & answer→
MCQ 91 MarkSky wave propagation is based on :✓reflection from ionosphereBabsorption by ionosphereCtransmission through ionosphereDnone of theseAnswerCorrect option: A. reflection from ionosphereAView full question & answer→
MCQ 101 MarkDigital signals are :Acontinuous function of time✓of discreate valuesCsignal of decimal number systemDsinusoidal functionAnswerCorrect option: B. of discreate valuesBView full question & answer→
MCQ 111 MarkWhich of the following are not reflected by clouds ?AMicro wavesBRadio wavesCInfrared rays✓Ultraviolet raysAnswerCorrect option: D. Ultraviolet raysDView full question & answer→
MCQ 121 MarkFrom which layer of atmosphere are radiowaves reflected ?✓ionosphereBstretosphereCtroposphereDnone of theseAnswerCorrect option: A. ionosphereAView full question & answer→