The correct answer is: 7,2
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Sim yog’ochga osilgan lampaning kuchi 300 kd, yer sirtidan balandligi esa 3 m ga teng. Yer sirtining lampa ostidagi nuqtasidan 4 m masofda joylashgan, nuqtalarinng yoritilganligini (lk) toping. Select one: a. 7,2 b. 2,9
c. 8,1 d. 5,4
Feedback The correct answer is: 7,2 Question 2 Correct
Mark 1.00 out of 1.00 Flag question Question text 2 mkF sig’imda 1000 Gs tovush chastotasini olish uchun tebranish konturiga qanday induktivlik (mGn) ulash kerak? Select one: a. 12,7
b. 34,1 c. 6,28
d. 25,56 Feedback
The correct answer is: 12,7 Question 3 Correct Mark 1.00 out of 1.00 Flag question Question text Tokli o’tkazgichlar atrofida magnit maydon hosil bo’lishligini birinchi bo’lib kim aniqlagan? Select one: a. Erestet b. A.Papov c. M.Faradey d. I.Nyuton Feedback The correct answer is: Erestet Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text Agar quyoshdan yergacha masofa 150 million km bo’lsa, yorug’lik yerga qancha vaqtda yetib keladi? Select one: a. 2 soat b. 14 min, 12 s c. 320 sekend d. 8 min, 20 sek Feedback
The correct answer is: 8 min, 20 sek Question 5 Incorrect Mark 0.00 out of 1.00 Flag question Question text 1 mkF sig’imli kondensator va 3000 Om aktiv qarshilikli reostat 50 Gs chastotali o’zgaruvchan tok zanjiriga ulandi. Agar ular parallel ulansa to’la qarshiligi qancha bo’ladi. Select one: a. 2420 b. 2180
c. 1840 d. 1275
Feedback The correct answer is: 2180 Question 6 Correct
Mark 1.00 out of 1.00 Flag question Question text Boshqa barcha sharoitlarini o’zgartirmasdan g’altakning aktiv qarshiligi ortirilsa, bu konturdagi erkin elektromaginit tebranishlarga qanday ta’sir qiladi? Select one: a. tebranishlar davri kamayadi va ularning so’nishi kuchayadi b. tebranishlar davri kamayadi va ularning so’nishi ortadi c. tebranishlar chastotasi kamayadi va ularning so’nishi ortadi d. tebranishlar chastotasi kamayadi va ularning so’nishi kuchayadi Feedback
The correct answer is: tebranishlar chastotasi kamayadi va ularning so’nishi kuchayadi Question 7 Incorrect Mark 0.00 out of 1.00 Flag question Question text O’tkazgich kontur bir jinsli bo’lmagan magnit maydonda ilgarlanma harakat qilmoqda. Bu holda konturda induksion EYuK paydo bo’ladimi. Select one: a. agar o’tkazgich ferromagnit moddadan iborat bo’lsa, yo’q b. agar o’tkazgich ferromagnit moddadan iborat bo’lsa, ha c. yo’q d. ha
Feedback The correct answer is: ha Question 8 Incorrect Mark 0.00 out of 1.00 Flag question Question text Agar qaytgan va singan nurlar orasidagi burchak 120 gradus bo’lsa, havodan etil spirt (n=1,36) ga o’tishdagi nurning sinish burchagini aniqlang. Select one: a. 25 gradus b. 40 gradus c. 30 gradus d. 35 gradus Feedback
The correct answer is: 25 gradus Question 9 Correct Mark 1.00 out of 1.00 Flag question Question text Yoruqlik manbayi bir tekis yorug’lanuvchi sferik sirtidan iborat. Agar manbaga yaqinlashilsa manbaning ravshanligi qanday o’zgaradi? Select one: a. ortadi b. to’g’ri javob yo’q c. kamayadi d. o’zgarmaydi Feedback The correct answer is: o’zgarmaydi Question 10 Correct
Mark 1.00 out of 1.00 Flag question Question text Tokli to’g’ri o’tkazgichdan 4,5 sm masofada joylashgan nuqtadagi magnit maydon induksiyasi 0,00028 Tl gat eng. Shu nuqtadagi maydon kuchlanganligi va o’tkazgichdan o’tuvchi tok kuchini toping. Select one: a. 220 A/m, 127 A b. 180 A/m, 63 A c. 220 A/m, 63 A d. 180 A/m, 127 A Feedback
The correct answer is: 220 A/m, 63 A Question 11 Incorrect Mark 0.00 out of 1.00 Flag question Question text Yupqa linzaning optik kuchi 5,0 Dptr ga teng. Buyum linzadan 60 sm masofada joylashgan. Buyumning ta’sviri qayerda hosil bo’ladi va u qanday ta’svir bo’ladi? Select one: a. f=20sm; tasvir mavhum, to’g’ri va kattalashgan b. f=30sm; tasvir haqiqiy, to’nkarilgan va kichraygan c. f=20sm; tasvir mavhum, to’g’ri va kichraygan d. f=30sm; tasvir haqiqiy, to’g’ri va kichraygan Feedback The correct answer is: f=30sm; tasvir haqiqiy, to’nkarilgan va kichraygan Question 12 Incorrect Mark 0.00 out of 1.00 Flag question Question text Quyosh nurlari yoritayotgan kitobga uning sirtiga perpendikular ravishda 36 lm oqimi tushmoqda. Agar kitobni 30 gradus burilsa, unga qanday yoruqlik oqimi (lm) tushadi? Select one: a. 38
b. 26 c. 13
d. 31 Feedback
The correct answer is: 31 Question 13 Incorrect Mark 0.00 out of 1.00 Flag question Question text Yorug’lik chastotasini (vakuumdagi to’lqin uzunligini) muhitning nur sindirish ko’rsatkichiga bog’liqlik hodisasi nima deb ataladi? Select one: a. Dispersiya b. Qutublanish c. Interferensiya d. Difraksiya Feedback The correct answer is: Dispersiya Question 14 Incorrect Mark 0.00 out of 1.00 Flag question Question text Agar yorug’lik yerdan oy gacha bo’lgan 384000 km masofani 1,28 s vaqtda o’tsa, yoruqlikning tarqalish tezligi (m/s) qancha bo’ladi? Select one: a. 1500
b. 300000000 c. 340
d. 9000 Feedback
The correct answer is: 300000000 Question 15 Incorrect Mark 0.00 out of 1.00 Flag question Question text Cho’lg’ami orqali o’zgarmas tok o’tayotgan kuchli elektromagnitning qutublari yaqinida mis plastinka osilgan. Elektromagnit cho’lg’amidagi tok kuchi tez orttirilsa nima bo’ladi? Select one: a. plastinka elektromagnitdan qochadi b. plastinka tebrana boshlaydi c. plastinka elektromagnitga tortiladi d. o’zgarmaydi Feedback The correct answer is: plastinka elektromagnitdan qochadi Question 16 Incorrect Mark 0.00 out of 1.00 Flag question Question text O’tkazgich kontur bir jinsli magnit maydonda ilgarlanma harakat qilmoqda. Bu holda konturda induksion EYuK paydo bo’ladimi. Select one: a. agar o’tkazgich ferromagnit moddadan iborat bo’lsa, ha b. ha c. yo’q
d. agar o’tkazgich ferromagnit moddadan iborat bo’lsa, yo’q Feedback
The correct answer is: yo’q Question 17 Correct Mark 1.00 out of 1.00 Flag question Question text Yorug’likni yo’lida uchragan shaffofmas to’siqni aylanib o’tishi yoki geomertik soya sohasiga kirib boorish hodisasi nima deb ataladi? Select one: a. Qutublanish b. Interferensiya c. Difraksiya d. Dispersiya Feedback The correct answer is: Difraksiya Question 18 Correct
Mark 1.00 out of 1.00 Flag question Question text Ikkita yorug’lik manbi qandan shart bajarilganda o’zaro kogaren bo’ladi? Select one: a. urlarni yo’llar farqi to’lqin uzunligining yariniga toq karrali bo’lishi kerak b. Nurlarni yo’llar farqi to’lqin uzunligining yariniga juft karrali bo’lishi kerak c. Bir hil materialdan tashkil topgan bo’lishi kerak d. Hech qachon kogorent bo’lmaydi Feedback
The correct answer is: Hech qachon kogorent bo’lmaydi Question 19 Incorrect Mark 0.00 out of 1.00 Flag question Question text Zanjir ulangandan so’ng tok orta borayotganda elektr zanjirda energiyaning qanday aylanishlari sodir bo’ladi? Select one: a. ichki va magnit maydon energiyalariga b. mexanik, ichki va magnit maydon energiyalariga c. mexanik va magnit maydon energiyalariga d. ichki va mexanik energiyalariga Feedback The correct answer is: ichki va magnit maydon energiyalariga Question 20 Correct
Mark 1.00 out of 1.00 Flag question Question text Elektron va teshiklar qo’shilsa nima bo’ladi? Select one: a. Neytral atom hosil bo’ladi b. Neytral atom hosil bo’ladi, energiya yutiladi c. ionlashadi d. Neytral atom hosil bo’ladi, energiya ajraladi Feedback
The correct answer is: Neytral atom hosil bo’ladi, energiya ajraladi Question 21 Correct Mark 1.00 out of 1.00 Flag question Question text Nur sindirish ko’rsatkichi 1,73 bo’lgan shishadan suvga o’tayotgan xol uchun to’la qutblanish burchagi nimaga teng bo’ladi? Select one: a. 40 gradus b. 25 gradus c. 30 gradus d. 42 gradus Feedback The correct answer is: 30 gradus Question 22 Correct
Mark 1.00 out of 1.00 Flag question Question text Linyadagi yo’qolishlarni n marta kamaytirish uchun manbaning kuchlanishi necha marta o’zgarishi kerak? Generator beradigan quvvat o’zgarmas deb hisoblang. Select one: a. √n marta ortishi b. n martta kamayishi c. n marta ortishi d. √n martta kamayishi Feedback
The correct answer is: √n marta ortishi Question 23 Correct Mark 1.00 out of 1.00 Flag question Question text Agar aktiv qarshiligi juda kichik bo’lgan konturning sig’imini uch marta ortirib, induktivlikni uch marta kamaytirilsa konturning xususiy tebranishlari qanday o’zgaradi? Select one: a. 9 martta ortadi b. o’zgarmaydi c. 3 martta ortadi d. 9 martta kamayadi Feedback The correct answer is: o’zgarmaydi Question 24 Incorrect Mark 0.00 out of 1.00 Flag question Question text Yorug’lik nuri glitserindan suvga o’tmoqda. Agar tushish burchagi 30 gradus bo’lsa, nurning sinish burchagi 45 gradus bo’lsa. Glitserinni nur sindirish ko’rsatkichini aniqlang. Suv uchun n=1,33 Select one: a. 1,46
b. 1,72 c. 1,5
d. 1,87 Feedback
The correct answer is: 1,87 Question 25 Correct Mark 1.00 out of 1.00 Flag question Question text Yorug’lik nurini ikki nuqtasi orasidagi masofa 3λ; 2nλ/2 (n- butun son) bo’lsa bu nuqtalardagi fazasi haqida nima deyish mumkin? Select one: a. fazalari 2 π /3 ga farq qiladi b. fazalari π/2 ga farq qiladi c. fazalari π ga farq qiladi d. fazalari bir xil Feedback The correct answer is: fazalari bir xil Question 26 Incorrect Mark 0.00 out of 1.00 Flag question Question text Transformator salt ishlaganda tarmoqda oz energiya oladi. Bu energiya nimaga sarf bo’ladi? Select one: a. Quvvatni orttirishga b. Magnit mayonni elektr maydonga aylantirishga c. Kuchlanishni orttirishga d. Qizishiga Feedback
The correct answer is: Qizishiga Question 27 Incorrect Mark 0.00 out of 1.00 Flag question Question text Egrilik radiuslari bir xil va 25 smga teng, absalyut sindirish ko’rsatkichi 1,6 bo’lgan shishadan yasalgan ikki yoqlama botiq linzaning optik kuchini (Dptr) aniqlang. Select one: a. -3,6 b. -2,4
c. -1,9 d. -4,8
Feedback The correct answer is: -4,8 Question 28 Incorrect Mark 0.00 out of 1.00 Flag question Question text Kuchli elektromagnit ferromagnitmas o’tkazuvchi materialdan yasalgan bitta buyumning o’zini tortishi mumkinmi? Select one: a. ha, qutublarda bo’lsa b. yo’q c. ha, elektromagnitdagi tok tez o’zgarganda d. ha, elektromagnitdagi tok o’zgarmas bo’lsa Feedback
The correct answer is: ha, elektromagnitdagi tok tez o’zgarganda Question 29 Correct Mark 1.00 out of 1.00 Flag question Question text 25 o’ramdan iborat simri ramka magnit maydonda shunday joylashganki, undan 0,12 Vb tashqi magnit oqimi kesib o’tadi. Ramka o’ramlari orqali 8,4 A tok o’tkazilganda u burildi va undan 0,077 Vb tashqi magnit oqimi o’tadigan bo’ldi. Ramka burilishida bajarilgan ishni toping (J). Select one: a. 0,65 b. 56
c. 14 d. 109
Feedback The correct answer is: 14 Question 30 Incorrect Mark 0.00 out of 1.00 Flag question Question text Bir to’g’ri chiziqda joylashgan va tebranish manbaidan 12 m va 14 m masofalarda turgan nuqtalar 3 π/2 rad faza farqi bilan tebranmoqda. Agar manbaning tebranish davri 0,00000001 s bo’lsa, bu tebranishlarni tarqalish tezligini (km/s) toping? Select one: a. 2,4
b. 5,4 c. 4,5
d. 3,6 Feedback
The correct answer is: 3,6 Kimning tajribasi natijasida atomni Yadroviy ya’ni Planetar modelitaklif qilindi? Select one: a. Rezerford b. P.Lebedev c. Frank-Gers d. J.Tomson Feedback
The correct answer is: Rezerford Question 2 Correct Mark 1.00 out of 1.00 Flag question Question text Zanjir ulangandan so’ng tok orta borayotganda elektr zanjirda energiyaning qanday aylanishlari sodir bo’ladi? Select one: a. mexanik va magnit maydon energiyalariga b. ichki va mexanik energiyalariga c. ichki va magnit maydon energiyalariga d. mexanik, ichki va magnit maydon energiyalariga Feedback The correct answer is: ichki va magnit maydon energiyalariga Question 3 Correct
Mark 1.00 out of 1.00 Flag question Question text Agar quyoshdan yergacha masofa 150 million km bo’lsa, yorug’lik yerga qancha vaqtda yetib keladi? Select one: a. 14 min, 12 s b. 2 soat c. 320 sekend d. 8 min, 20 sek Feedback
The correct answer is: 8 min, 20 sek Question 4 Incorrect Mark 0.00 out of 1.00 Flag question Question text Fazoda elektr zaryadlar bo’lmaganda yopiq magnit kuch chiziqlari ya’ni induksiya chiziqlari boladimi. Select one: a. doim hosil bo’ladi b. bo’lmaydi c. Ha, agar magnit maydonni o’zgarmas elektr maydon hosil qilgan bo’lsa d. Ha, agar magnit maydonni o’zgaruvchan elektr maydon hosil qilgan bo’lsa Feedback The correct answer is: Ha, agar magnit maydonni o’zgaruvchan elektr maydon hosil qilgan bo’lsa Question 5 Correct
Mark 1.00 out of 1.00 Flag question Question text Buyum yig’uvchi linzadan F va 2F oralig’iga joylashtirilsa, buyum tasviri qayerda hosil bo’ladi. Select one: a. F
b. 2F c. linza va F oralig’ida d. 2F dan uzoqda Feedback
The correct answer is: 2F dan uzoqda Question 6 Correct Mark 1.00 out of 1.00 Flag question Question text Agar yoruqlik bilan yoritilgan yupqa pardaga uning sirtiga perpendicular yo’nalishda qaralsa , qaytgan yorug’likda u yashil bo’lib ko’rinadi. Agar parda yorug’lik nurlariga nisbatan og’dirilsa, unning tusi qanday ozgaradi? Select one: a. sariqqa o’tadi b. o’zgarmaydi c. Pardaning rangi yashil rangdan asta – sekin havo rangiga , ko’k va binavsha ranga o’tadi d. pardaning rangi yashil rangdan asta – sekin qizil rangiga va binavsha ranga o’tadi Feedback The correct answer is: Pardaning rangi yashil rangdan asta – sekin havo rangiga , ko’k va binavsha ranga o’tadi Question 7 Correct
Mark 1.00 out of 1.00 Flag question Question text Bir to’g’ri chiziqda joylashgan va tebranish manbaidan 12 m va 14 m masofalarda turgan nuqtalar 3 π/2 rad faza farqi bilan tebranmoqda. Agar manbaning tebranish davri 0,00000001 s bo’lsa, bu tebranishlarni tarqalish tezligini (km/s) toping? Select one: a. 5,4
b. 3,6 c. 2,4
d. 4,5 Feedback
The correct answer is: 3,6 Question 8 Incorrect Mark 0.00 out of 1.00 Flag question Question text Yig’uvchi linza bosh fokusiga nuqtaviy yorug’lik manbayi joylashtirilgan. Agar linzaning boshqa tomonida uning optika oqiga perpendicular ravishda yassi kozgu jipislashtirib ornatilsa, manba tasviri qayerda hozil bo’ladi va u qanday bo’ladi? Select one: a. 3F da, mavhum b. 2Fda, mavhum c. F da, haqiqiy d. F va 2F orasida, haqiqiy Feedback The correct answer is: F da, haqiqiy Question 9 Correct
Mark 1.00 out of 1.00 Flag question Question text Boshqa barcha sharoitlarini o’zgartirmasdan g’altakning aktiv qarshiligi ortirilsa, bu konturdagi erkin elektromaginit tebranishlarga qanday ta’sir qiladi? Select one: a. tebranishlar chastotasi kamayadi va ularning so’nishi kuchayadi b. tebranishlar chastotasi kamayadi va ularning so’nishi ortadi c. tebranishlar davri kamayadi va ularning so’nishi kuchayadi d. tebranishlar davri kamayadi va ularning so’nishi ortadi Feedback
The correct answer is: tebranishlar chastotasi kamayadi va ularning so’nishi kuchayadi Question 10 Incorrect Mark 0.00 out of 1.00 Flag question Question text Yorug’likning bir muxitda tarqalish tezligi 225000 km/s, ikkinchisi esa 200000 km/s ga teng. Yorug’lik nuri bu muxitlarning ajralish chegarasi sirtida 30 gradus burchak ostida tushib, ikkinchi muxitda o’tadi . Nurning sinish burchagini aniqlang. Select one: a. 45 gradus b. 26 gradus c. 36 gradus d. 32 gradus Feedback The correct answer is: 26 gradus Question 11 Correct
Mark 1.00 out of 1.00 Flag question Question text Gorizantal yorug’lik nuri vertikal joylashgan yassi ko’zguga tushadi. Ko’zgu o’z o’qi atrofida 17 gradusga burilsa, qaytgan nur qanchaga (gradus) buriladi? Select one: a. 17
b. 63 c. 34
d. 41 Feedback
The correct answer is: 34 Question 12 Correct Mark 1.00 out of 1.00 Flag question Question text Yorog’lik absalyut oq jismga tushganda, absalyut qora jismga tushgandagiga nisbatan ko’p bosim beradi? Select one: a. 16 b. 10
c. 2 d. 4
Feedback The correct answer is: 2 Question 13 Incorrect Mark 0.00 out of 1.00 Flag question Question text Sof yarim o'tkazgichlarda o'ta o'tkazuvchanlik qachon kuzatiladi? Select one: a. juda past temperaturada b. juda yuqori temperaturada c. doim kuzatiladi d. kuzatilmaydi Feedback
The correct answer is: kuzatilmaydi Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text Yupqa linzaning optik kuchi 5,0 Dptr ga teng. Buyum linzadan 60 sm masofada joylashgan. Buyumning ta’sviri qayerda hosil bo’ladi va u qanday ta’svir bo’ladi? Select one: a. f=20sm; tasvir mavhum, to’g’ri va kichraygan b. f=30sm; tasvir haqiqiy, to’g’ri va kichraygan c. f=20sm; tasvir mavhum, to’g’ri va kattalashgan d. f=30sm; tasvir haqiqiy, to’nkarilgan va kichraygan Feedback The correct answer is: f=30sm; tasvir haqiqiy, to’nkarilgan va kichraygan Question 15 Incorrect Mark 0.00 out of 1.00 Flag question Question text Zanjirdagi tok I=0,20 sin314 t (A) qonun bo’yicha o’zgardi. Bu zanjirga ulangan C=0,000002 F sig’imli kondensator teshilish ro’y bermasligi uchun qanday kuchlanishga mo’jjallangan bo’lishi kerak ? Select one: a. 213 V dan ko’p bo’lmagan kuchlanishga b. 176 V dan ko’p bo’lmagan kuchlanishga c. 319 V dan kam bo’lmagan kuchlanishga d. 427 V dan kam bo’lmagan kuchlanishga Feedback
The correct answer is: 319 V dan kam bo’lmagan kuchlanishga Question 16 Incorrect Mark 0.00 out of 1.00 Flag question Question text Induktivligi 25 mGn bo’lgan zanjirda tok I = (0,3+0,4t) A qonun bo’yicha o’zgarganda hosil bo’ladigan induksiya EYuK ning oniy qiymati qanday bo’ladi (mV). Select one: a. 1 b. 0,01
c. 10 d. 0,1
Feedback The correct answer is: 10 Question 17 Correct
Mark 1.00 out of 1.00 Flag question Question text Tokli to’g’ri o’tkazgichdan 4,5 sm masofada joylashgan nuqtadagi magnit maydon induksiyasi 0,00028 Tl gat eng. Shu nuqtadagi maydon kuchlanganligi va o’tkazgichdan o’tuvchi tok kuchini toping. Select one: a. 220 A/m, 63 A b. 180 A/m, 63 A c. 220 A/m, 127 A d. 180 A/m, 127 A Feedback
The correct answer is: 220 A/m, 63 A Question 18 Correct Mark 1.00 out of 1.00 Flag question Question text Yoruqlik kuchi 25 kd bo’lgan tuqtaviy yorug’lik manbayi 0,64 str li fazoviy burchak ichida qancha yoruqlik oqimi (lm) tarqatadi? Select one: a. 25 b. 3
c. 8 d. 16
Feedback The correct answer is: 16 Question 19 Incorrect Mark 0.00 out of 1.00 Flag question Question text 100 va 50 kd ikkita lampa bir-biridan 2,4 m masofada joylashgan. Noshaffof ekarnni ularning orasida qayerda o’rnatilsa, uning har ikkila tomonini yoritilgani bir xil bo’ladi? Select one: a. 100 kd li lampadan 2,1 m masofada b. 100 kd li lampadan 1,4 m masofada c. 50 kd li lampadan 2,4 m masofada d. 50 kd li lampadan 1,4 m masofada Feedback
The correct answer is: 100 kd li lampadan 1,4 m masofada Question 20 Incorrect Mark 0.00 out of 1.00 Flag question Question text 1,5 MGs chastotada ishlayotgan radiostansiya tolqinining tolqin uzunligi (m) qanchaga teng? Select one: a. 300 b. 120
c. 200 d. 280
Feedback The correct answer is: 200 Question 21 Correct
Mark 1.00 out of 1.00 Flag question Question text Agar stol sirtining o’rtacha yoritilganligi 9500 lk (kino siyomka payitidagi yoritilganlik), stol sirtining yuzi esa 1,6 m2 bo’lsa, bu sirtiga qancha yoruqlik oqimi (1000 lm) tushadi? Select one: a. 15
b. 2 c. 12
d. 6 Feedback
The correct answer is: 15 Question Download 0.97 Mb. Do'stlaringiz bilan baham: 
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