8-sinf fizika O’zbekistonda nechta issiqlik va Gidroelektr stansiyalar bor?

A)10 sm B)10mm C)10m D)0.1 sm E)0.01sm

10. 20 n C Li zaryad potensiali 700V bo’lgan nuqtadan potensiali 200V bo’lgan nuqtaga ko’chganda qancha ish bajaradi?

A)1 mk J B)10 mk J C)100 mk J D)1000 mk J E)0.1 mk J

11. Kondensator kuchlanishi 4 marta ortsa uning energiyasi necha marta ortadi?

A)2 B)4 C)16 D)24 E)64

12. 12 mV kuchlanish berilgan uzunligi 10 m ko’ndalang kesimi 2 mm2 bo’lgan po’lat simdagi tok kuchini toping? (mA)

A)10 B)20 C)30 D)40 E)1

13. Massasi 11t bo’lgan trolleybus 36 km/ h tezlik bilan harakatlanmoqda. Agar kuchlanish 550 V va FIK 80% bo’lsa dvigateldagi tok kuchini toping. Harakatga qarshilik koeffitsenti 0.02 (A)

A)50 B)500 C)0.5 D)5 E)10

14.Diotda electron anodga 8 Mm/ s tezlik bilan keladi. Anod kuchlanishini toping.

A)18 V B)180 V C)1.8 V D)0.18 V E)1800 V

15.Oyga birinchi bor qachon chiqilgan?