Turli muhitlarda elektr toki — Masalalar yechish — 10-sinf Fizika test savollari

1.Namuna 1 masalasida kumush qatlamining qalinligi necha mm deb berilgan?

• A)0,08 mm
• B)0,008 mm
• C)0,8 mm
• D)8 mm

2.Namuna 1 masalasida kumushning zichligi necha kg/m3 deb berilgan?

• A)1,05·$10^3$
• B)10,5·$10^3$
• C)10,5·$10^2$
• D)10,5·$10^4$

3.Namuna 2 masalasidagi elektroliz qurilmasining kuchlanishi necha V edi?

• A)12 V
• B)24 V
• C)42 V
• D)4,2 V

4.Namuna 2 masalasidagi elektroliz qurilmasining foydali quvvati necha kW edi?

• A)1 kW
• B)100 kW
• C)0,1 kW
• D)10 kW

5.Namuna 1da kumush qatlamining massasini topish uchun qanday formula ishlatilgan?

• A)m = ρ$\cdot$S$\cdot$d
• B)m = k$\cdot$U
• C)m = q$\cdot$U
• D)m = P$\cdot$t

6.Namuna 1 masalasida (S=25 cm2, d=0,08 mm, k=1,118·10⁻⁶ kg/C, ρ=10,5·10³ kg/m3) qoshiqni kumush bilan qoplash uchun qancha zaryad o'tishi kerak?

• A)187,8 C
• B)1878 C
• C)938 C
• D)18780 C

7.Namuna 2 masalasida (U=42 V, P=10 kW, t=2 soat, k=0,329·10⁻⁶ kg/C) elektroliz qurilmasida necha kg mis yig'iladi?

• A)0,0564 kg
• B)5,64 kg
• C)0,564 kg
• D)1,128 kg

8.2 soat davomida katodda 20 mg nikel yig'ilgan bo'lsa (nikel uchun k=0,304 mg/C), elektrolitdan o'tgan tok kuchi qancha bo'lgan?

• A)0,091 A
• B)0,91 A
• C)9,1 A
• D)0,0091 A

9.12 V kuchlanishga mo'ljallangan 6 kW quvvatli elektroliz qurilmasida 2 soat davomida necha kg kumush yig'iladi (kumush uchun k=1,118 mg/C)?

• A)4,02 kg
• B)0,402 kg
• C)40,2 kg
• D)2,01 kg

10.5 A tok 3 soat davomida o'tib, nikel qatlamining qalinligi 0,1 mm bo'lsa (nikel zichligi 8900 kg/m3, k=0,304 mg/C), nikel qoplangan yuza qancha bo'lgan?

• A)18,45 cm2
• B)184,5 cm2
• C)1845 cm2
• D)92,2 cm2