The correct answer is: 7,2
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Correct Mark 1.00 out of 1.00 Flag question Question text Nima uchun tranziator bazasining kengligi kichik bo’lishi kerak. Select one: a. Baza orqali o’tuvchi asosiy bo’lgan zaryad tashuvchilar rekombinatsiyalanishi uchun b. Baza orqali o’tuvchi asosiy bo’lmagan zaryad tashuvchilar rekombinatsiyalashib ulgurmasligi uchun c. Baza orqali o’tuvchi asosiy bo’lmagan zaryad tashuvchilar to’qnashishini kamaytirish uchun d. Baza orqali o’tuvchi asosiy bo’lgan zaryad tashuvchilar to’qnashishini kamaytirish uchun Feedback The correct answer is: Baza orqali o’tuvchi asosiy bo’lmagan zaryad tashuvchilar rekombinatsiyalashib ulgurmasligi uchun Question 11 Correct
Mark 1.00 out of 1.00 Flag question Question text Yarim o'tkazgichlarda qanday zarrachalar tok tashishda hizmat qiladi? Select one: a. elektron va ionlar b. ionlar c. Elektron va kovaklar d. ion va kovaklar Feedback
The correct answer is: Elektron va kovaklar Question 12 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 13 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 π/2 ga farq qiladi b. fazalari 2 π /3 ga farq qiladi c. fazalari bir xil d. fazalari π ga farq qiladi Feedback
The correct answer is: fazalari bir xil Question 14 Correct Mark 1.00 out of 1.00 Flag question Question text 1 mm 125 shtrixi bo’lgan difraksion panjarada ekrangacha masofa 2,5 m teng. Panjara 420 nm to’lqin uzunlikli yorug’lik bilan yoritilganda ekranda ko’k chiziqlar ko’rinadi. Ekrandagi markazi chiziqdan birinchi chiziqqacha masofani (sm) aniqlang. Select one: a. 22 b. 17
c. 9 d. 13
Feedback The correct answer is: 13 Question 15 Correct
Mark 1.00 out of 1.00 Flag question Question text 0,25 Tl induksiali bir jinsli magnit maydondagi 1,4 m uzunlikli to’g’ri o’tkazgichga 2,1 N kuch tasir qiladi. Agar o’tkazgichdagi tok kuchi 12 A bo’lsa, tok yo’nalishi bilan magnit maydon yo;nalishi orasidagi burchakni toping. Select one: a. 90 grad b. 60 grad c. 45 grad d. 30 grad Feedback
The correct answer is: 30 grad Question 16 Correct Mark 1.00 out of 1.00 Flag question Question text Tranzisterning a)emitter-baza, b) baza-kollektor qismida kuchlanush birday kattalikka orttiriladi. Bu holda kollektor zanjiridagi tok birday ortadimi. Select one: a. ikkala holda ham bir xil b. a- holda tok ko’proq c. b-holda tok ko’proq d. a-holda tok kamiroq Feedback The correct answer is: a- holda tok ko’proq Question 17 Correct
Mark 1.00 out of 1.00 Flag question Question text Yorug’likni zarracha hosasini qaysi hodisalar tasdiqlaydi? 1. Qutublanish 2. Yorug’lik bosimi 3. Interferensiya 4. Fotoeffekt 5. Dispersiya 6. Difraksiya 7, Kompton effekti Select one: a. 2,4,6,7 b. 1,2,3,6 c. 1,3,5,6 d. 2,4,7 Feedback
The correct answer is: 2,4,7 Question 18 Correct Mark 1.00 out of 1.00 Flag question Question text Tok kuchi 2 A ga tekis ortganda magnit maydon energy.asi 0,01 J ga ortadigan salenoidning induktivligini (mGn) toping? Zanjirdagi o’rtacha tok kuchi 5 A. Select one: a. 1 b. 5
c. 1,5 d. 2,5
Feedback The correct answer is: 1 Question 19 Correct
Mark 1.00 out of 1.00 Flag question Question text Magnitlanmagan po’lat strelka gorizantal ravishda shunday joylashtirilganki, u gorizantal va vertikal tekisliklarda erkin aylana oladi. U magnitlangandan so’ng hamma vaqt Yerning magnit maydonida gorizantal holatda qolaveradimi. Select one: a. yo’q faqat magnit ekvatorida bo’ladi b. Ha c. yo’q faqat magnit qutublarda d. Ha faqat yerdan uncha katta bo’lmagan balandliklarda Feedback
The correct answer is: yo’q faqat magnit ekvatorida bo’ladi Question 20 Correct Mark 1.00 out of 1.00 Flag question Question text 20 A tok o’tayotgan 30 s m diometrli halqaning magnit momentini aniqlang (A*m2) ? Select one: a. 3,6 b. 4,2
c. 2,48 d. 1,4
Feedback The correct answer is: 1,4 Question 21 Correct
Mark 1.00 out of 1.00 Flag question Question text Qanday EYUK sistemasi simmetirik hisoblanadi? Select one: a. Fazalari bir-biriga nisbatan 30 gradus siljigan b. Fazalari bir-biriga nisbatan 120 gradus siljigan c. o’zaro tik d. Fazalari bir-biriga nisbatan 60 gradus siljigan Feedback
The correct answer is: Fazalari bir-biriga nisbatan 120 gradus siljigan Question 22 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. Bir hil materialdan tashkil topgan bo’lishi kerak c. Hech qachon kogorent bo’lmaydi d. Nurlarni yo’llar farqi to’lqin uzunligining yariniga juft karrali bo’lishi kerak Feedback The correct answer is: Hech qachon kogorent bo’lmaydi Question 23 Correct
Mark 1.00 out of 1.00 Flag question Question text Nima sababdan gulxan oldida o’tirganimizda gulxanning narigi tomonidagi buyumlar tebranib ( chimirlab) ko’rinadi? Select one: a. gulxan ta’sirida molekulalar harakatlanganligi uchun b. gulxan nurni qaytarganligi uchun c. gulxan tepasidagi havoni sindirish korsatkichi o’zgarganligi uchun d. gulxan tufayli yorug’lik tezlashganligi uchun Feedback
The correct answer is: gulxan tepasidagi havoni sindirish korsatkichi o’zgarganligi uchun Question 24 Correct Mark 1.00 out of 1.00 Flag question Question text Transformatorning tranformatsiya koeffitsienti 20 ga teng. Qaysi chulg’amdagi simlarning ko’ndalang kesimi katta bo’lishi kerak. Select one: a. ikkilamchi chulg’amniki b. ikkinchini o’ramlar soni ko’p c. o’zaro teng d. birlamchi chulg’amniki Feedback The correct answer is: ikkilamchi chulg’amniki Question 25 Correct
Mark 1.00 out of 1.00 Flag question Question text Egrilik radiusi 7,5 m linza yassi plastinka ustiga qo’yilgan bo’lib, u linzaning bosh optik o’qiga parallel tushuvchi 450 nm to’lqin uzunlikli yoruqlik bilan yoritiladi. Bunda qaytgan nurdan hosil bo’lgan 2 chi qorong’u Nyuton halqasi radiusni (mm) aniqlang. Agar linzani n=1,5 ga teng. Select one: a. 2,4
b. 1,5 c. 2,7
d. 3 Feedback
The correct answer is: 1,5 Question 26 Correct Mark 1.00 out of 1.00 Flag question Question text Yassi silliq sirtda sirtmoq shaklida bukulgan yumshoq sim joylashgan. Agar undan kuchli tok o’tkazilsa, u qanday shaklni oladi. Select one: a. vintsimon b. Aylana c. to’g’ri chiziq d. ellips Feedback The correct answer is: Aylana Question 27 Correct
Mark 1.00 out of 1.00 Flag question Question text Transformator salt ishlaganda tarmoqda oz energiya oladi. Bu energiya nimaga sarf bo’ladi? Select one: a. Kuchlanishni orttirishga b. Magnit mayonni elektr maydonga aylantirishga c. Quvvatni orttirishga d. Qizishiga Feedback
The correct answer is: Qizishiga Question 28 Correct Mark 1.00 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. 300000000 b. 1500
c. 340 d. 9000
Feedback The correct answer is: 300000000 Question 29 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 ajraladi c. Neytral atom hosil bo’ladi, energiya yutiladi d. ionlashadi Feedback
The correct answer is: Neytral atom hosil bo’ladi, energiya ajraladi Question 30 Correct Mark 1.00 out of 1.00 Flag question Question text Qizil chegarasi 496,5 nm bo’lgan moddadan elektronni chiqish ishini (eV) toping. Select one: a. 3,2 b. 1,5
c. 2,5 d. 2
Feedback The correct answer is: 2,5 Download 0.97 Mb. Do'stlaringiz bilan baham: |
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