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25.____________________________________________Tekshirdi:_I.Ayitboyev_Baxosi:______________'>25.___________________________________________
Tekshirdi: I.Ayitboyev Baxosi: _____________
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MASALALAR
1.Ikki sharchaga bir xil 5*10-8 C zaryad berilgan. Zaryadlar 3*10-4 N kuch bilan itarishmoqda, sharchalar orasidagi masofani toping ?
2. Sig’imi 400 pF bo’lgan yassi kondensator qoplamalar yuzasi 200 sm2 ga teng. Qoplamalar orasiga shisha plastina qo’yilgan bo’lsa , bunday sig’imli kondensator qoplamalari orasi qancha bo’lishi kerak?Shisha uchun E=7.
3. Eletr zanjiriga ulangan rezistorning qarshiligi 100 . Rezistor uchlari orasidagi kuchlanish 10 V bo’lsa ,undan qancha tok o’tadi?
4. Reostat uzunligi 40 m , ko’dalang kesimining yuzi 0,5 mm2 bo’lgan nikelin simdan
yasalgan.Reostat qisqichlaridagi kuchlanish 80 V . Reostat orqari o’tadigan tok kuchi qancha ? Nikelin simning solishtirma qarshiligi 0,4*10-6 m2/m
5. Ko’ndalang kesim yuzi 0.3 mm2 bo’lgan 9 qarshilikli spiral tayyorlash uchun qanday uzunlikda xromel sim kerak boladi? Xromel uchun solishtirma qarshilik 1.4*10-6 m2/m.
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