DTM Test Fizika — Questions and Answers

Question 1: Massa 2 kg bo'lgan jism 3 m/s² tezlanish bilan harakatlanmoqda. Kuch qancha?

6 N (Correct answer)
1,5 N
9 N
0,67 N

Correct answer: 6 N

F = 2 × 3 = 6 N

Question 2: 45 m balandlikdan tosh tashlanadi. Yerga qancha vaqtda yetadi? (g=10 m/s²)

3 s (Correct answer)
4,5 s
9 s
6 s

Correct answer: 3 s

t = √(2h/g) = √9 = 3 s

Question 3: 5 kg jismga 20 N kuch, μ=0,2. Tezlanish? (g=10)

2 m/s² (Correct answer)
4 m/s²
1 m/s²
3 m/s²

Correct answer: 2 m/s²

Ftr = 10N, a = 10/5 = 2 m/s²

Question 4: 72 km/soat — bu necha m/s?

20 m/s (Correct answer)
25 m/s
18 m/s
72 m/s

Correct answer: 20 m/s

72/3,6 = 20 m/s

Question 5: 4 kg jism 5 m ko'tarildi. Potensial energiya? (g=10)

200 J (Correct answer)
400 J
100 J
50 J

Correct answer: 200 J

Ep = 4×10×5 = 200 J

Question 6: 3 kg, 10 m/s. Kinetik energiya?

150 J (Correct answer)
300 J
30 J
60 J

Correct answer: 150 J

Ek = 3×100/2 = 150 J

Question 7: Gorizontal otilgan jism uchun to'g'ri fikr?

Gorizontal tezlik o'zgarmas, vertikal ortib boradi (Correct answer)
Ikkala o'zgarmas
Gorizontal kamayib, vertikal ortadi
Ikkala ortadi

Correct answer: Gorizontal tezlik o'zgarmas, vertikal ortib boradi

Gorizontal — o'zgarmas, vertikal — g bilan ortadi

Question 8: Impuls nima va birligi?

Massa va tezlik ko'paytmasi; kg·m/s (Correct answer)
Kuch va vaqt; N·m
Massa va tezlanish; kg·m/s²
Kuch va masofa; J

Correct answer: Massa va tezlik ko'paytmasi; kg·m/s

Impuls p = mv, birligi kg·m/s

Question 9: k=500 N/m prujina x=0,1 m cho'zildi. Energiya?

2,5 J (Correct answer)
5 J
50 J
0,25 J

Correct answer: 2,5 J

E = 500×0,01/2 = 2,5 J

Question 10: Markazga intilma tezlanish formulasi?

a = v²/R (Correct answer)
a = vR
a = v/R
a = v²R

Correct answer: a = v²/R

a = v²/R

Question 11: Gazning P 2x oshirildi, V 3x kamaydi. T qanday o'zgaradi?

2/3 barobar kamayadi (Correct answer)
6 barobar ortadi
6 barobar kamayadi
O'zgarmaydi

Correct answer: 2/3 barobar kamayadi

T₂ = T₁ × (2P×V/3)/(PV) = 2T₁/3

Question 12: Q = ΔU + A formulasida A nima?

Gazning ishi (Correct answer)
Tashqi kuchlar ishi
Ichki energiya
Issiqlik miqdori

Correct answer: Gazning ishi

A — gazning bajargan ishi

Question 13: Absolyut nol Selsiy shkalasida?

-273 °C (Correct answer)
-100 °C
0 °C
-373 °C

Correct answer: -273 °C

0 K = -273 °C

Question 14: Muzning solishtirma erish issiqligi 336 kJ/kg. 500 g muz eritish uchun qancha issiqlik?

168 kJ (Correct answer)
336 kJ
672 kJ
84 kJ

Correct answer: 168 kJ

Q = 336 × 0,5 = 168 kJ

Question 15: Masofa 2x oshirilsa, Kulon kuchi qanday o'zgaradi?

4 barobar kamayadi (Correct answer)
2 barobar kamayadi
4 barobar ortadi
O'zgarmaydi

Correct answer: 4 barobar kamayadi

Kuch 4 barobar kamayadi

Question 16: Elektr maydon kuchlanganligining birligi?

V/m
N/C va V/m ikkalasi ham (Correct answer)
N/C
A/m

Correct answer: N/C va V/m ikkalasi ham

1 N/C = 1 V/m

Question 17: 10 Ω ga 5 A tok. Quvvat?

250 W (Correct answer)
50 W
500 W
2 W

Correct answer: 250 W

P = 25×10 = 250 W

Question 18: EMK=12 V, r=0,5 Ω, R=11,5 Ω. Tok?

1 A (Correct answer)
2 A
0,5 A
12 A

Correct answer: 1 A

I = 12/12 = 1 A

Question 19: B=2 T, l=0,5 m, I=3 A. Amper kuchi?

3 N (Correct answer)
6 N
1,5 N
12 N

Correct answer: 3 N

F = 2×3×0,5 = 3 N

Question 20: Elektromagnit induksiyada EYK nimaga bog'liq?

Magnit oqimining o'zgarish tezligiga (Correct answer)
Magnit maydon kuchiga
O'tkazgich uzunligiga
Tok kuchiga

Correct answer: Magnit oqimining o'zgarish tezligiga

Faraday qonuni: EYK magnit oqimi o'zgarish tezligiga proportsional

Question 21: C=100 mkF, U=200 V. Kondensator energiyasi?

2 J (Correct answer)
4 J
0,02 J
20 J

Correct answer: 2 J

W = 10⁻⁴×40000/2 = 2 J

Question 22: L=0,1 H, f=50 Hz. Induktiv qarshilik? (π≈3,14)

31,4 Ω (Correct answer)
5 Ω
62,8 Ω
0,005 Ω

Correct answer: 31,4 Ω

XL = 2×3,14×50×0,1 = 31,4 Ω

Question 23: Lorens kuchi formulasi?

F = qvB sinα (Correct answer)
F = qvB cosα
F = qB/v
F = qv/B

Correct answer: F = qvB sinα

F = qvBsinα

Question 24: Shisha n=1,5. To'liq ichki qaytish chegara burchagi?

41,8° (Correct answer)
30°
60°
45°

Correct answer: 41,8°

sinθc = 1/1,5 = 0,667 → θc ≈ 41,8°

Question 25: Linza f=20 sm, predmet d=60 sm. Tasvir qayerda?

30 sm (Correct answer)
20 sm
40 sm
15 sm

Correct answer: 30 sm

1/d' = 1/20 - 1/60 = 2/60, d' = 30 sm

Question 26: Yorug'lik interferensiyasi nimani isbotlaydi?

To'lqin tabiatini (Correct answer)
Zarracha tabiatini
To'g'ri tarqalishini
Diffraktsiyasini

Correct answer: To'lqin tabiatini

Interferensiya to'lqin tabiatini isbotlaydi

Question 27: Diffraktsiya panjara: 1mm da 500 chiziq, λ=600 nm. Birinchi tartibli burchak?

17,5° (Correct answer)
30°
8,6°
45°

Correct answer: 17,5°

d=2μm, sinθ=0,3, θ≈17,5°

Question 28: Muhit o'zgarganda yorug'likda qaysi kattalik o'zgarmasdan qoladi?

Chastota (Correct answer)
To'lqin uzunligi
Tezlik
To'lqin uzunligi va tezlik

Correct answer: Chastota

Chastota o'zgarmaydi; to'lqin uzunligi va tezlik o'zgaradi

Question 29: Dispersiya hodisasi nimani tushuntiradi?

Turli to'lqin uzunlikdagi nurlarning turli tezlikda tarqalishini (Correct answer)
Nurning qaytishini
Nurning sinishini
Interferensiyani

Correct answer: Turli to'lqin uzunlikdagi nurlarning turli tezlikda tarqalishini

Dispersiya — turli chastotali nurlarning turli tezlikda tarqalishi

Question 30: Fotoeffektda Ek_max nimaga bog'liq?

Faqat yorug'lik chastotasiga (Correct answer)
Faqat intensivlikka
Ikkalasiga
Metallning massasiga

Correct answer: Faqat yorug'lik chastotasiga

Kinetik energiya faqat chastotaga bog'liq

Question 31: Atom asosiy holatdan qo'zg'algan holatga o'tganda nima qiladi?

Foton yutadi (Correct answer)
Foton chiqaradi
Elektron yo'qotadi
Proton yutadi

Correct answer: Foton yutadi

Atom foton yutib qo'zg'alanadi

Question 32: T=8 kun, N₀=1000. 24 kundan keyin qancha qoladi?

125 (Correct answer)
250
500
333

Correct answer: 125

N = 1000/2³ = 125

Question 33: Alfa parchalanishda zaryad va massa soni qanday o'zgaradi?

Zaryad 2 ga, massa soni 4 ga kamayadi (Correct answer)
Zaryad 1 ga, massa soni 0 ga
Zaryad 1 ga ortadi
Zaryad 2 ga ortadi, massa 4 ga ortadi

Correct answer: Zaryad 2 ga, massa soni 4 ga kamayadi

Zaryad 2 ga, massa soni 4 ga kamayadi

Question 34: De Broyl formulasi?

λ = h/(mv) (Correct answer)
λ = mv/h
λ = hv/m
λ = m/(hv)

Correct answer: λ = h/(mv)

λ = h/(mv)

Question 35: Izobarli jarayonda 2 mol gaz 300 K dan 600 K gacha qizdirildi. Ish? (R=8,31)

4986 J (Correct answer)
2493 J
9972 J
1247 J

Correct answer: 4986 J

A = 2×8,31×300 = 4986 J

Question 36: Q = mcΔT da c nimani anglatadi?

Solishtirma issiqlik sig'imi (Correct answer)
Massa
Temperatura farqi
Issiqlik o'tkazuvchanlik

Correct answer: Solishtirma issiqlik sig'imi

c — solishtirma issiqlik sig'imi

DTM Test Fizika

Massa 2 kg bo'lgan jism 3 m/s² tezlanish bilan harakatlanmoqda.
Kuch qancha?