Oʻzgarmas tok qonunlari

Question 1

Uzunligi 1 km bo‘lgan nixrom simning qarshiligini ($\Omega$) aniqlang. Simning ko‘ndalang kesim yuzi 2 mm$^2$.

Accepted Answer

550

Answer

55

Answer

5,5

Answer

5500

Question 2

Rasmda qizdirgich lampaning volt-amper xarakteristikasi tasvirlangan. Undan 1,4 A tok o‘tayotganda tokning quvvatini (W) toping.

Accepted Answer

8,4

Answer

7,6

Answer

6,9

Answer

6,3

Question 3

Kimyoviy tok manbaining EYuKi 6 V, ichki qarshiligi 1/4 $\Omega$ ga teng. Manba zanjirga 2 A tok berayotgan bo‘lsa, uning qutblaridagi kuchlanishni (V) toping.

Accepted Answer

5,5

Answer

6,5

Answer

7

Answer

5

Question 4

Alyuminiydan yasalgan simning 0 °C dagi qarshiligi 3,5 $\Omega$ ga teng. Uning qarshiligi 200 °C da qanchaga ($\Omega$) ortishini aniqlang. $\alpha=0{,}0028$ K$^{-1}$

Accepted Answer

1,96

Answer

1,87

Answer

2,12

Answer

3,14

Question 5

Reostatning surgichi chapga surilsa, ampermetrning ko‘rsatishi qanday o‘zgarishini aniqlang.

Accepted Answer

ortadi

Answer

o‘zgarmaydi

Answer

kamayadi

Answer

nolga teng bo‘ladi

Question 6

Qaysi kalit ulansa, eng ko‘p sondagi lampochkalar yorug‘lik tarqatadi?

Accepted Answer

3

Answer

1

Answer

4

Answer

2

Question 7

Kuchlanish tarmog‘iga ulangan simdan ajralib chiqayotgan issiqlik quvvati 18 W ga teng. Bu simning o‘rniga ko‘ndalang kesim yuzi 1,2 marta katta boshqa sim ulansa, unda qancha quvvat (W) ajraladi?

Accepted Answer

21,6

Answer

12,4

Answer

15

Answer

27

Question 8

Agar $R_1=R_2=R_3$ bo‘lsa, rezistorlardan bir xil vaqt davomida ajralib chiqayotgan issiqlik miqdorlarining nisbati $Q_1:Q_2:Q_3$ ni aniqlang.

Accepted Answer

4:1:1

Answer

1:1:1

Answer

4:4:1

Answer

1:4:4

Oʻzgarmas tok qonunlari

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