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

1.Elektr tokining ma'lum vaqtda bajargan ishi qaysi formula bilan ifodalanadi?

• A)A = IUt
• B)A = I/Ut
• C)A = U/It
• D)A = I + U + t

2.Elektr toki bajargan ishning asosiy birligi nima deb ataladi?

• A)Vatt
• B)Joul
• C)Om
• D)Amper

3.Matnga ko'ra, 1 vatt-sekund (W$\cdot$h emas, W$\cdot$s) qancha joulga teng?

• A)36 J
• B)360 J
• C)3600 J
• D)36000 J

4.Sarflangan elektr energiya miqdor jihatdan nimaga teng bo'ladi?

• A)Zanjirdagi kuchlanish miqdoriga
• B)O'tkazgichdagi tok kuchiga
• C)O'tkazgichning elektr qarshiligiga
• D)Elektr tokining bajargan ishiga

5.Elektr hisoblagich (schyotchik)ning ko'rsatishi qanday birlikda bo'ladi?

• A)kW$\cdot$h
• B)Joul (J)
• C)Amper (A)
• D)Volt (V)

6.Tok kuchi I = 2 A, kuchlanish U = 220 V bo'lgan iste'molchidan 10 s davomida tok o'tsa, tokning bajargan ishini toping.

• A)440 J
• B)4400 J
• C)2200 J
• D)20 J

7.Isitgich I = 5 A tok kuchi va U = 220 V kuchlanishda 2 daqiqa (120 s) ishlasa, uning bajargan ishini toping.

• A)1100 J
• B)26400 J
• C)132000 J
• D)600 J

8.Matnda keltirilgan birliklarga asosan, 1 MW$\cdot$h necha kW$\cdot$h ga teng bo'ladi?

• A)10 kW$\cdot$h
• B)100 kW$\cdot$h
• C)10000 kW$\cdot$h
• D)1000 kW$\cdot$h

9.1 kW$\cdot$h = 1000 W$\cdot$h va 1 W$\cdot$h = 3600 J ekanini hisobga olib, 3 kW$\cdot$h energiya necha joulga teng ekanini toping.

• A)10 800 000 J
• B)3600 J
• C)10800 J
• D)1 080 000 J

10.Matndagi birliklarga asosan, 1 kW$\cdot$h necha W$\cdot$h ga teng?

• A)100 W$\cdot$h
• B)1000 W$\cdot$h
• C)3600 W$\cdot$h
• D)10000 W$\cdot$h