Comm Diss 311-page9

Comm Diss 311-page9 -...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 16.Theamplitudespectrumofasinewaveofreasonabledurationisasingle verticalline.(Ofcourse) 17.Thefrequencyofasinewavehavinga2msecperiodis400Hz.(No,500Hz) 18.Thefrequencyofasinewavewitha1msecperiodis10,000Hz.(No,1000Hz) 19.Theperiodofasinewavewithafrequencyof1000Hzis1msec.(absolutely) 20.Theperiodofasinewavewithafrequencyof200Hzis5msec.(Si) 21.Iftwosinewaveshavethesamepeakamplitudeandsamefrequencytheyare necessarilyidenticalwaveforms.(Nobecausethestartingphasecouldbe different) 22.Asinewavethatstartsat0amplitudemusthave0degreestartingphase.(No, couldbe180degrees) 23.Asquarewaveandatrianglewavecontainthesamespectralcomponentsand differonlyintherateoffalloffinamplitudeofthecomponentswithincreasing frequency.(True) 24.Asquarewaveiscomposedofbothoddandevenharmonics.(No,oddonly) 25.Asawtoothwaveiscomposedofbothoddandevenharmonics.(True) 26.Ifthefundamentalfrequencyofawaveis300Hzandthenextthreefrequencies are900Hz,1500Hz,and2100Hzitisundoubtedlygoingtobeatrianglewave.(No, becauseitcouldbeasquarewave,orsomethingelseifthephasesarescrambled) 27.Acomplexperiodicwavewithafundamentalfrequencyof400Hzwillrepeat itselfevery1msec.(No,every2.5ms) 28.Acomplexperiodicwavewithafundamentalfrequencyof400Hzcouldhave harmonicsat400,600,800,1000,and1200Hz.(No,600Hzand1000Hzarenot integermultiplesof400Hz) 29.Acomplexperiodicwavewithafundamentalfrequencyof100Hzcouldhave harmonicsat200,300,500,600,and1000Hz.(Sure) 30.Ifawaveformismadeupofsinewavecomponentsof50,150,and200Hz,then 200Hzisthethirdharmonicofthefundamental.(No,itisthefourthharmonicof 50Hzfundamental) 31.Ifthefundamentalfrequencyofasquarewaveis100Hz,thesecondharmonicis 300Hz.(No,threetimesthefundamentalisthethirdharmonic). ...
View Full Document

This document was uploaded on 10/31/2011 for the course COM DIS 311 at UMass (Amherst).

Ask a homework question - tutors are online