Elektr tokining ishi va quvvati — Elektr tokining quvvati — 8-sinf Fizika test savollari

1.Elektr tokining quvvatini topish uchun tokning bajargan ishini nimaga bo'lish kerak?

• A)Vaqtga
• B)Kuchlanishga
• C)Tok kuchiga
• D)Qarshilikka

2.Elektr iste'molchining quvvati qaysi ikki fizik kattalikning ko'paytmasiga teng?

• A)Qarshilik va vaqt
• B)Tok kuchi va kuchlanish
• C)Ish va vaqt
• D)Zaryad va qarshilik

3.Elektr toki quvvatining asosiy birligi (vatt) kim sharafiga qabul qilingan?

• A)Georg Simon Om
• B)Andre Amper
• C)Jeyms Uatt
• D)Aleksandr Volta

4.Matnga ko'ra, 1 kilovatt (kW) necha vattga teng?

• A)10 W
• B)100 W
• C)10000 W
• D)1000 W

5.Matndagi ta'rifga ko'ra, bir vatt qanday tokning quvvati deb ataladi?

• A)Kuchlanishi 1 volt bo'lgan qismida kuchi 1 amper bo'lgan tokning quvvati
• B)Kuchlanishi 1 amper bo'lgan tokning quvvati
• C)Qarshiligi 1 om bo'lgan o'tkazgichdagi tokning quvvati
• D)1 sekundda 1 joul ish bajargan tokning quvvati

6.7-jadvalga ko'ra, dazmolning elektr quvvati qanday oraliqda bo'ladi?

• A)1–3 W
• B)500–2000 W
• C)40–200 W
• D)0,1 W

7.7-jadvaldagi iste'molchilar orasida qaysi birining quvvati eng kichik?

• A)Uyali telefon
• B)Ko'chma radio
• C)Elektr soat
• D)Cho'ntak fonari

8.Elektr lampochkaning quvvati 110 W, unga ulangan tarmoq kuchlanishi 220 V bo'lsa, lampochkadan o'tayotgan tok kuchini toping.

• A)5 A
• B)2 A
• C)220 A
• D)0,5 A

9.Iste'molchidan o'tayotgan tok kuchi 2 A, unga qo'yilgan kuchlanish 220 V bo'lsa, uning quvvatini toping.

• A)440 W
• B)110 W
• C)222 W
• D)880 W

10.Quvvati 1000 W bo'lgan dazmoldan 5 A tok o'tayotgan bo'lsa, undagi kuchlanishni toping.

• A)200 V
• B)5000 V
• C)50 V
• D)995 V