'^ tt ! I J- Jrzvrc ,.{1 co? rr.nch loifrrt'ri, afAt or, /hr,tth 7i1ir r,.':cf J-" la {"or f,d'*ln , , $' '-l U. KJE a\.Aat( pE rnr vr0N v0 ruvfN n$N rf rnuAr v su hdi tidp: * Hay thi& l4p bidu thrlc tinh hQ sd ttrudcn d+i diQn ttrd ttri chrla c6 hdi tidp K vdi hQ sd . khudch d4i itiQn thd khi c6 m4ch trdi tidp cfia mQt m4ch khudch tlqi diQn thd K'. * Gi6i,ttrlcti.,$.U hdi tidp.dudng vi h6i tidp 6m, cho bidt khi nlo dtng cr{c lo4i h6i tidp ndy. * theo anh titti), sU trdi ti6p c6 lgi hay c6 h4i? * Khi trang bi 0m thanh cho mQt hQi tn/dng, cho bidt v.hi nguy€n tic co bdn dd kh6ng 14o n€n tidng hri ldn phdt ra 6 loa. IV Dai thOng. cfia mQt mach khudch ttai: , * Cho bidt hinh d4ng cfia dudng cong bi6u di6n HQ sd khudch tt4i diQn thd K theo tdn sd f (ho{c log fl cta mQt m4ch khudch itai. Gi6i thich hinh dang cria iludng bidu di6n nhy . * Dinhngtriadiith6ng. f6^ clru ll^[q ht P ' cassette, m4ch khudch tlai nio cdn c6 dii th6ng rQng hon, t4i sao? * Cho Uidt *Ot vii phrrong phdp md rQng dii th6ng cho mQt m4ch khudch rlai tliQn thd. IIV Cdc blng tdn cfia s6ng itiQn tt: * Liet ke ddy dri c6c bing tAn cria s6ng tliQn tU , dii tdn s6'cria n6 vd cho bidt pham vi sf dqng cdc bnng dn niy trong viQc truydn thOng tin blng vO tuydn tliQn. * Bing tdn nho s6ng diQn til c6 il{c tinh phin x4,d tdng iliQn ly (tdng ion) b6n ngodi ctng bdu khi quy6h bria TrdiDdc - , 1 lai 5bo'$ {*rbdg ddi.c6q!! +a t!}.i ri:ri; dr,. tirgh pirti l}m rn-s-ten thu rdt cao mdi thu tldgc ' "" rr" nreii",r; eai t*ve?t;fo ' i x Dai.ph6t thanh TP HCM phdt s6ng tr6n blng tAn ndo dd c6c mdy thu thanh d cric tinh ' xa rhu duqc? d ttguy TP HCM mdy thu c6 thu drrgc s6ng niy kh6ng, giii thich tai sao? IV/ Didu chdtdn sd(rvO: . * Cho bidt nguy6n tdc cria sqr didu chd tAn sd. * Thidt l{p bidu thr?c cria sr/ di€u c}rdtdn sd s6ng cao tAn u(t) ndu chgn: ir klttrct :., I irl.,lrttct,1 "| i; lltlLL r i i' A t,,. I a vd u2(t) = .Uz sin Q t li tin hiQu didu chd c6 tdn sd p = l 2r * C6 nh$n x6t gl vd phd tdn sd cria phrrong thrlc didu chd ndy. * T?i sao phrrdng thric didu chd tdn sd (FlyI) c6 nhidu rru didm hdn so vdi phrrong thtl'c didu chdbi€n ttO (AM). .l1l'\'ll\,.1.' il.i O rs;trlr"tnl',/rt1",." tt' rir:: I Ho vd t6n sinh vi6n: ' Sd b6o danh: I I I E t I $" tl I i { . '^ tt ! I J- Jrzvrc ,.{1 co? rr.nch loifrrt'ri, afAt or, /hr,tth 7i1ir r,.':cf J-" la {"or f,d'*ln , , $' '-l U. KJE a.Aat( pE rnr. ion) b6n ngodi ctng bdu khi quy6h bria TrdiDdc - , 1 lai 5bo'$ {*rbdg ddi.c6q!! +a t!}.i ri:ri; dr,. tirgh pirti l}m rn-s-ten thu rdt cao mdi thu tldgc ' "". mdy thu c6 thu drrgc s6ng niy kh6ng, giii thich tai sao? IV/ Didu chdtdn sd(rvO: . * Cho bidt nguy6n tdc cria sqr didu chd tAn sd. * Thidt l{p bidu thr?c cria sr/ di€u c}rdtdn