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Zanjirdagi ( rasmga qarang ) voltmеtr nimani ko`rsatadi ?
A) 5 V B) 7 V C) 3 V D) 10 V
13
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| bet | 7/12 | | Sana | 21.10.2022 | | Hajmi | 93.64 Kb. | | #27750 |
Bog'liq 8 sinf 1 variant (4 varaq ) Maqola 111, Ayollar shimini tikish, 3-mustaqil ish ZI, UkrJCIZ8FUtKPUnnLmQsbqCbljc7fGoLiu4DMKLU, 5-Topshiriq, 20-21-maruza, Dilnoza amaliy, N.Ulukova maqola 2, Axborotlarni himoyalash usullari. Reja, 2 5359486970516998398, 1 leksiya, Ўзбекистон республикаси олий ва ўрта махсус таълим вазирлиги ар, коллоквиум, Амалий иш 3 КА 955dfbb38184ee4988aca98712bcee9012. Zanjirdagi ( rasmga qarang ) voltmеtr nimani ko`rsatadi ?
A) 5 V B) 7 V C) 3 V D) 10 V
13. Elekytr sig'imi C1 bo'lgan n ta bir xil kondensator ketma-ket ulanganda umumiy sig'im qaysi formula yordamida hisoblanadi ?
A) C= C1/n B) C= C1/n2 C) C=nC1 D) C=(n+1)C1
14. R=U/I formuladan qanday fizik kattalik aniqlanadi?
A) Solishtirma qarshilik B) Kuchlanish C) Elektr qarshilik D) Tok kuchi
15. Yassi kondensatorning elektr sig'imi qanday kattaliklarga bog'liq ?
A ) kondensator qoplamasi yuziga B ) qoplamalar orasidagi masofaga
C ) qoplamalar orasidagi muhitninig elektr xususiyatlariga D) A, B, C javoblar tog'ri
16. Iste'molchilarni parallel ulashda zanjirning hamma qismlarida _____________ bir xil bo’ladi.
17. 500 A necha kA ga teng _______________________________
18. Metallar eng yaxshi o’tkazgichlarmi yoki dielektriklarmi ? _____________________
19. μF, nF, pF - bulardan qaysi biri eng katta ? _____________________
20. Har birining qarshiligi 15 Ω dan bo’lgan 3 ta o’tkazgich parallel ulansa, umumiy qarshilik ______ Ω ga teng bo’ladi.
Javoblar:
Test №
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O'quvchining javobi
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O'qituvchining tekshirish belgisi
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To'g'ri javoblar soni: ___________ ta , ____________ % , __________ball
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Sana: _________________________
5 – NAZORAT ISHI
Nazorat ishi mavzusi: Elektr tokining ishi va quvvati. Elektr isitish asboblari.
Nazorat shakli: Yozma ish
1. Agar dvigatel 220 V kuchlanish ostida 1,5 soat ishlatilsa sarflanadigan elektr energiyasini kW·soat hisobida aniqlang. Tok kuchi 5 A.
2. 20 Ω va 30 Ω qarshilikka ega bo'lgan ikki o'tkazgich parallel ulansa, zanjirning umumiy quvvati qanchaga teng bo'ladi ? Tok kuchi 2 A.
3. Ko'ndalang kesim yuzasi 2 mm2 bo'lgan 10 m uzunlikdagi nikelin simdan 1 soat davomida qancha issiqlik miqdori ajraladi ? Tok kuchi 2,5 A. Nikelin uchun ρ=0,4·10-6 Ω·m
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