BQ GIAO DUC VA DAO TAO<br />
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Ho vd t€nthi sinh:<br />
So bdo danh:<br />
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DAIHSCHUE<br />
.bpqd<br />
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rci, rnr ruyEN srNHsAUDArrrec NAu zorz@qtt)<br />
(ddnh cho: Caohqc) Thdi gian ldm bdi 180 philt<br />
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M6n thi: Vatlf ry tttuy6t<br />
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Ciu 1. Trqng th6i kich thich thrt nh6t cria dao ttQngtrt didu hda 1 chidu rlugc m6 ti bsi him s6ng:<br />
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-,trongo6 =[ ygl C V\=.,tzLEe'<br />
I^^-ttt1<br />
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\l/4<br />
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C =^l!9r. ' \ h \rit) a. Tinh circ gi6 ta rrung binh G d va nghiQmlai hQthric b6t dinh giira to.arIQvd xung lugng. b. Xric dinh dQngndngtrung binh f vi thi! nAng rung binh Z; tu d6 suy ra ndngluqng Ecua<br />
trpg tluii kfch thich ndy.<br />
. f+o<br />
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^ ^_: Ciu 2' Goi L,,Lr,L,theo thf t.uld toan tE hinh chi6um6menxung lugng cria hat vi m6 trdn ba trpc tqa d$ DA-c4c@escartes) I H torin tu trinh phuongm6menxung lugng, nguoi ta dinh n$ia c6c ve toantu ,* : L, + iLr:L_ : L, - iLy . D.Ua vdo cric h€ thrtc giao horin gitra circ torin tu hinh chi6u m6menxung lugng, hdy chung . , mmnrang:<br />
^ | ^ l^ ^ | ^ l^ lr ^ | -nt-vat g'.,1-)=2nt":lL,,i.l=hi.;Li,,L-l= =i-i. +f; +h1,.<br />
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' I tr ' ar.. t f. " Cho . 4 , I, = le^ 2^-x'dx =;,/+, bi6t: , = -' ) l t le-a'x46c 0 a Z\a'_r"<br />
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Ciu 3. Ttr phAn Maxwelttheociic hinhchi6ucuav4ntiic, hayr{rtra hdmptrrin Maxwelltheo b6 b6 modulvfn tlic vd xricdinhcacv6nt6c d4ctrungciraphrin ndy. bi5 C6u4. Chophen chinhtic luongtrt cuahpdang b6 fiCt c6 s6h4tkh6ng