Fizika (22.02.2025)

45 ta savol · saqlash uchun kiring

Fizika formulalar varaqasi / Лист формул по физике

Doimiy fizik kattaliklar / Физические постоянные

Kattalik	Qiymati
Erkin tushish tezlanishi	$g \approx 10\ \text{m/s}^2$
Gravitatsiya doimiysi	$G = \frac{20}{3}\cdot10^{-11}\ \frac{\text{N}\cdot\text{m}^2}{\text{kg}^2}$
Universal gaz doimiysi	$R = 8{,}31\ \text{J/(mol}\cdot\text{K)}$
Bolsman doimiysi	$k = 1{,}38\cdot10^{-23}\ \text{J/K}$
Avogadro soni	$N_A = 6\cdot10^{23}\ \text{mol}^{-1}$
Elementar zaryad	$e = 1{,}6\cdot10^{-19}\ \text{C}$
Kulon qonuni koeffitsiyenti	$k = 9\cdot10^{9}\ \frac{\text{N}\cdot\text{m}^2}{\text{C}^2}$
Elektr doimiysi	$\varepsilon_0 = 8{,}85\cdot10^{-12}\ \frac{\text{F}}{\text{m}}$
Magnit doimiysi	$\mu_0 = 4\pi\cdot10^{-7}\ \text{N/A}^2$
Yorug'likning vakuumdagi tezligi	$c = 3\cdot10^{8}\ \text{m/s}$
Plank doimiysi	$h = 4{,}125\cdot10^{-15}\ \text{eV}\cdot\text{s}$
Plank doimiysi	$h = 6{,}6\cdot10^{-34}\ \text{J}\cdot\text{s}$

O'nli old qo'shimchalar / Десятичные приставки

Old qo'shimcha	Ko'paytuvchi
T — tera	$10^{12}$
G — giga	$10^{9}$
M — mega	$10^{6}$
k — kilo	$10^{3}$
d — detsi	$10^{-1}$
c — santi	$10^{-2}$
m — milli	$10^{-3}$
$\mu$ — mikro	$10^{-6}$
n — nano	$10^{-9}$
p — piko	$10^{-12}$

Mexanika / Механика

v=\frac{\Delta S}{\Delta t};\quad a=\frac{\Delta v}{\Delta t};\quad S=v_0t+\frac{at^2}{2};\quad \omega=\frac{\Delta\varphi}{\Delta t};\quad \varepsilon=\frac{\Delta\omega}{\Delta t};\quad \varphi=\omega_0t+\frac{\varepsilon t^2}{2};

\omega=2\pi\nu;\quad v=\omega r;\quad \nu\cdot T=1;\quad v=v_0\pm gt;\quad h=v_0t\pm\frac{gt^2}{2};

v_{0x}=v_0\cos\alpha;\quad v_{0y}=v_0\sin\alpha;\quad t_u=\frac{2v_{0y}}{g};\quad h_{max}=\frac{v_{0y}^2}{2g};\quad S=v_{0x}\cdot t_u;

\vec{a}=\vec{a}_\tau+\vec{a}_n;\quad a_n=\frac{v^2}{r};\quad m=\rho V;\quad \vec{a}=\frac{\vec{F}}{m};\quad \vec{F}_1=-\vec{F}_2;\quad F_{el}=-k\Delta\ell;

a=g(\sin\alpha\pm\mu\cos\alpha);\quad \vec{p}=m\vec{v};\quad \vec{F}\Delta t=\Delta\vec{p};\quad E_k=\frac{mv^2}{2};

M=F\ell;\quad F_1\ell_1=F_2\ell_2;\quad F_{ish}=\mu N;\quad N=\frac{A}{t}=\vec{F}\vec{v};

A=FS\cos\alpha;\quad E_p=mgh;\quad E_k+E_p=\text{const};\quad \vec{P}=m(\vec{g}-\vec{a});

g=\frac{GM}{R^2};\quad v_1=\sqrt{gR};\quad v_2=\sqrt{2gR};\quad x=A\cdot\sin(\omega t+\varphi_0);\quad v=\sqrt{\frac{T}{\rho_{ch}}};

v=\sqrt{\frac{E}{\rho}};\quad \omega=\sqrt{\frac{k}{m}};\quad T=2\pi\sqrt{\frac{m}{k}};\quad \omega=\sqrt{\frac{g}{\ell}};\quad T=2\pi\sqrt{\frac{\ell}{g}};\quad \Delta\ell=\ell-\ell_0;

\varepsilon=\frac{\Delta\ell}{\ell_0};\quad k=\frac{ES}{\ell_0};\quad F_A=\rho_sV_bg;\quad p=\rho gh;\quad S_1v_1=S_2v_2;

V_b=\frac{\rho_jV_j}{\rho_s};\quad p+\rho gh+\frac{\rho v^2}{2}=\text{const}.

Molekulyar fizika / Молекулярная физика

\nu=\frac{N}{N_A}=\frac{m}{M};\quad n=\frac{N}{V};\quad d=\sqrt[3]{\frac{VM}{mN_A}};\quad \rho=nm_0;

p=\frac{2}{3}n\bar{E}_k=\frac{1}{3}\rho\bar{v}^2=nkT;\quad \bar{E}_k=\frac{m_0\bar{v}^2}{2}=\frac{3}{2}kT;

\bar{v}=\sqrt{\frac{3RT}{M}}=\sqrt{\frac{3kT}{m_0}};\quad T=t+273;

pV=\nu RT;\quad p=\frac{\rho}{M}RT;\quad \frac{pV}{T}=\text{const};\quad Q=\Delta U+A;

A=p\Delta V;\quad \Delta U=\frac{3}{2}(p_2V_2-p_1V_1)=\frac{3}{2}\nu RT;\quad C=\frac{Q}{T_2-T_1};

c=\frac{Q}{m(T_2-T_1)};\quad \lambda=\frac{Q}{m};\quad r=\frac{Q}{m};\quad q=\frac{Q}{m};

\eta=\frac{Q_1-Q_2}{Q_1}\cdot100\ \%=\frac{T_1-T_2}{T_1}\cdot100\ \%;\quad F=\sigma l;

\sigma=\frac{F}{S};\quad \sigma=E|\varepsilon|;\quad W=\sigma S;\quad h=\frac{2\sigma}{\rho gr};\quad \Delta p=\frac{2\sigma}{R};

\rho=\frac{m}{V};\quad \varphi=\frac{\rho}{\rho_0}\cdot100\ \%=\frac{p}{p_0}\cdot100\ \%.

Elektr va magnetizm / Электричество и магнетизм

F=\frac{k|qQ|}{\varepsilon r^2};\quad E=\frac{k|Q|}{\varepsilon r^2};\quad F=qE;\quad \varphi=\frac{kQ}{\varepsilon r};\quad W_p=q\varphi;

E=\frac{\varphi_1-\varphi_2}{d};\quad A=q(\varphi_1-\varphi_2);\quad W_{el}=\frac{qU}{2};\quad C=\frac{\varepsilon\varepsilon_0S}{d};\quad q=CU;

W=\frac{\varepsilon\varepsilon_0E^2}{2};\quad C_p=C_1+C_2+\cdots+C_N;\quad \frac{1}{C_{k-k}}=\frac{1}{C_1}+\frac{1}{C_2}+\cdots+\frac{1}{C_N};

E=\frac{U}{d}=\frac{\sigma}{\varepsilon\varepsilon_0};\quad I=\frac{U}{R};\quad Q=I^2Rt;\quad P=IU;\quad I=ne\bar{v}S;\quad j=\frac{I}{S};

q=It;\quad E=\rho j;\quad R=\frac{\rho l}{S};\quad R=R_0(1+\alpha\Delta t);\quad R_{k-k}=R_1+R_2+\cdots+R_N;

\frac{1}{R_p}=\frac{1}{R_1}+\frac{1}{R_2}+\cdots+\frac{1}{R_N};\quad \mathcal{E}=\frac{A_{chet}}{q};\quad I=\frac{\mathcal{E}}{R+r};\quad \eta=\frac{R}{R+r}=\frac{U}{\mathcal{E}};

I_a=kU^{\frac{3}{2}};\quad T=2\pi\sqrt{LC};\quad \omega=\frac{1}{\sqrt{LC}};\quad W=\frac{q^2}{2C}+\frac{LI^2}{2};

Z=\sqrt{R^2+\left(\omega L-\frac{1}{\omega C}\right)^2};\quad I=\frac{U}{Z};\quad \cos\varphi=\frac{R}{Z};\quad P=I^2R=IU\cos\varphi;

I=\frac{I_0}{\sqrt{2}};\quad U=\frac{U_0}{\sqrt{2}};\quad B=\frac{\mu_0I}{2\pi R};\quad B=\frac{\mu_0I}{2R};\quad F=\frac{\mu\mu_0I_1I_2}{2\pi d}l;

F_A=BIl\sin\alpha;\quad F_L=qvB\sin\alpha;\quad R=\frac{mv}{qB};\quad T=\frac{2\pi m}{qB};\quad \omega=\frac{qB}{m};

\Phi=NBS\cos\alpha;\quad \Phi=LI;\quad W=\frac{\Phi I}{2}=\frac{LI^2}{2};\quad \mathcal{E}=-\frac{\Delta\Phi}{\Delta t}=-L\frac{\Delta I}{\Delta t}.

Optika, kvant, atom va yadro fizikasi. Nisbiylik nazariyasi

n=\frac{c}{v}=\sqrt{\varepsilon\mu};\quad \frac{\sin\alpha}{\sin\beta}=\frac{n_2}{n_1};\quad \pm\frac{1}{F}=\frac{1}{d}\pm\frac{1}{f};\quad D=\pm\frac{1}{F};

k=\frac{f}{d};\quad \frac{1}{F}=\left(\frac{n_l}{n_m}-1\right)\left(\pm\frac{1}{R_1}\pm\frac{1}{R_2}\right);\quad I=\frac{P}{S}=\mathcal{W}v;\quad I\sim\omega^4;

d\sin\varphi=k\lambda;\quad \lambda_m=\frac{b}{T};\quad I=\frac{I_0}{2};\quad I=I_0\cos^2\alpha;\quad I=\frac{\Phi}{\Omega};

E=\frac{\Phi}{S}=\frac{I}{R^2}\cos\varphi;\quad E=h\nu;\quad p=\frac{h\nu}{c}=\frac{h}{\lambda};\quad I=\frac{N}{S\cdot t}h\nu;

h\nu=A_{ch}+E_k^{max};\quad E_k^{max}=eU_{yop};\quad h\nu_{min}=\frac{hc}{\lambda_{max}}=A_{ch};

E_n=\frac{E_1}{n^2};\quad E_1=-13{,}6\ eV;\quad h\nu=E_n-E_m;\quad m_ev_nr_n=n\hbar;

r_n=n^2r_B;\quad v_n=\frac{v_1}{n};\quad E_{bog'}=\Delta mc^2;\quad E_{sol}=\frac{E_{bog'}}{A};

A=-\frac{dN}{dt};\quad N=N_0e^{-\lambda t}=N_0 2^{-\frac{t}{T}};\quad \lambda T=\ln 2\approx0{,}7;

\tau=\frac{\tau_0}{\sqrt{1-\frac{v^2}{c^2}}};\quad l=l_0\sqrt{1-\frac{v^2}{c^2}};\quad \rho=\frac{\rho_0}{1-\frac{v^2}{c^2}};\quad v=\frac{v_1+v_2}{1\pm\frac{v_1v_2}{c^2}};

m=\frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}};\quad E_0=m_0c^2;\quad E=mc^2;\quad \vec{p}=m\vec{v};

E_k=(m-m_0)c^2;\quad E^2-c^2p^2=m_0^2c^4.

Moddalar va ularning xossalari / Вещества и их свойства

Zichlik (kg/m$^3$) / Плотность

Modda	Zichlik
benzin	700
kerosin	800
suv (4 °C)	1000
spirt	800
simob	13600
alyuminiy	2700
muz	900
mis	8900
po'lat	7800
temir	7800

Solishtirma issiqlik sig'imi (J/(kg·K)) / Удельная теплоёмкость

Modda	Qiymat
alyuminiy	900
mis	380
muz	2100
oltin	120
rux	400
suv	4200
temir	450
cho'yan	500

Molyar massa (g/mol) / Молярная масса

Modda	M
argon (Ar)	40
azot ( $N_2$ )	28
geliy (He)	4
neon (Ne)	20
havo	29
suv ( $H_2O$ )	18
karbonad angidrid ( $CO_2$ )	44
mis (Cu)	64
alyuminiy (Al)	27
kislorod ( $O_2$ )	32
vodorod ( $H_2$ )	2

Boshqa kattaliklar

Kattalik	Qiymat
Muzning solishtirma erish issiqligi (0 °C)	$330\cdot10^{3}\ \text{J/kg}$
Suvning solishtirma bug'lanish issiqligi (100 °C)	$2{,}3\cdot10^{6}\ \text{J/kg}$
Benzinning yonish issiqligi	$46\cdot10^{6}\ \text{J/kg}$
Neftning yonish issiqligi	$44\cdot10^{6}\ \text{J/kg}$
Spirtning yonish issiqligi	$29\cdot10^{6}\ \text{J/kg}$
Tabiiy gazning yonish issiqligi	$44\cdot10^{6}\ \text{J/kg}$
Toshko'mirning yonish issiqligi	$29\cdot10^{6}\ \text{J/kg}$
Yog'ochning yonish issiqligi	$10\cdot10^{6}\ \text{J/kg}$

Sirt taranglik koeffitsiyenti (20 °C), $10^-3$ N/m

Modda	Qiymat
benzin	21
kerosin	24
suv	73
spirt	22
sovun eritmasi	40
simob	510

O'tkazgichlarning solishtirma qarshiligi (20 °C), $10^-8\ \Omega\cdot$m

Modda	Qiymat
mis	1,7
alyuminiy	2,8
volfram	5,5
temir	9,8
nikelin	40
nixrom	110

Nur sindirish ko'rsatkichi / Показатель преломления

Modda	n
suv	$4/3$
shisha	1,5
yoqut	1,76
olmos	2,42

Ayrim birliklar o'rtasidagi munosabat va normal sharoit

Munosabat	Qiymat
0 °C	$273\ \text{K}$
1 u	$1{,}66\cdot10^{-27}\ \text{kg}$
1 eV	$1{,}6\cdot10^{-19}\ \text{J}$
1 mm Hg	$133{,}3\ \text{Pa}$
Normal bosim	$10^{5}\ \text{Pa}$
Normal temperatura	$0\ ^\circ\text{C}$

Shartli belgilar / Условные обозначения

× ×— magnit induksiya chiziqlari o'quvchidan qog'oz tekisligiga tik yo'nalgan
• •— magnit induksiya chiziqlari qog'oz tekisligidan o'quvchiga tik yo'nalgan
⊕— o'tkazgichdagi tok o'quvchidan qog'oz tekisligiga tik yo'nalgan
⊙— o'tkazgichdagi tok qog'oz tekisligidan o'quvchiga tik yo'nalgan

Eslatma: bu formulalar yordam sifatida tavsiya qilinadi.

Agar jismning

a

— umumiy tezlanishi,

a_n

— normal tezlanish,

a_t

— tangensial tezlanish bo'lsa quyidagilardan qaysilari to'g'ri.

1)

a_n > a

a_t > a

a \ge a_t

a \ge a_n

Birinchi jism sharqqa

5/13

m/s tezlik bilan, ikkinchi jism janubga

12/13

m/s tezlik bilan harakat qilmoqda. Ularning nisbiy tezligini (m/s) toping.

Rasmda ishqalanish kuchi moduli

F

ning normal bosim kuchi moduli

N

ga bog'lanish grafigi berilgan. Rasmdan foydalanib ishqalanish koeffitsientlari orasidagi bog'liqlikni toping.

Rasmda uzunligi 1,3 m bo'lgan vazinsiz sterjen,

CB = 0,5

m uzunlikdagi arqon yordamida devorga mahkamlangan. Agar sterjinning

B

uchiga 12 kg massali yuk ilinsa sterjindagi reaksiya kuchini (N) toping.

Rasmdagi nuqtada jismning og'irligi qaysi yo'nalishga mos tushadi.

Purjinaga 5 kg massali yuk osilganda 8 sm cho'zilgan bo'lsa, uning bikirligini (kN/m) toping.

Agar yerning quyosh atrofidagi aylanish tezligi 30 m/s ga teng bo'lsa, Zuhro planetasining aylanish radiusi yernikidan 25% foizga kam bo'lsa, Zuhro planatasning tezligini (m/s) toping.

Massasi 2 kg tezligi 6 m/s bo'lgan va massasi 1 kg tezligi 5 m/s bo'lgan jismlar o'z aro tik holda harakat qilayotgan bo'lsa ularni natijaviy impulsini (kg

\cdot

m/s) toping.

Tebranma harakat qilayotgan jismning

8/3

sekunddagi tezlanishini toping.

10.

Agar purjinali mayatnikning to'la energiyasi 5 marta ortsa tebranish amplitudasi qanday o'zgaradi.

11.

Agar havo shari geliy gazi o'rniga teng miqdordagi neon gazi bilan to'ldirilsa uning yuk ko'tarish qobiliyati qanday o'zgaradi. Havo shari qobig'ining massasini hisobga olmang. Havoning molyar massasi 29 g/mol ga teng.

12.

Gaz rasmda ko'rsatilganidek 1-holatdan 2-holatga o'tgan bo'lsa, bu jarayon nomini va gaz zichligi qanday o'zgarganligini toping.

13.

Idishda 1,5 MPa bosim ostida

27^\circ

C haroratli gaz bor. Agar gazni temperaturasini yana

60^\circ

C ga oshirildi va bunda idishdan gazning 40% chiqib ketdi. Idishda qolgan gazning bosimini (MPa) toping?

14.

Xonadagi havo haroarati 290 K dan 300 K gacha isitildi. Lekin xonadagi bosim o'zgarmagan bo'lsa, xonadagi gazning ichki energiyasi qanday o'zgaradi.

15.

4 mol bir atomli ideal gazning ichki energiyasi 9600 J bo'lsa, uning absalyut haroratini (K) toping.

16.

Havoda radiusi 2 mm bo'lgan suv tomchisining egrlanishi natijasida hosil bo'lgan qo'shimcha bosimni (Pa) toping.

\pi = 3

deb hisoblang.

17.

Agar jism 8

\mu

C zaryadlangan bo'lsa, yo'qotilgan elektronlar sonini toping.

18.

Qo'rg'oshin

^{207}_{82}

Pb neytral atomidagi elektronlar sonini toping.

19.

Zaryadlari

Q

q

bo'lgan, zaryadli zarralar bir biridan 10 sm masofada joylashgan. Zaryadlar orasidagi masofani 5 sm ga qisqartrish uchun

4/5

mJ ish bajarildi. Yana 3 sm ga qisqartrish uchun qanday ish bajarish (mJ) kerak.

20.

O'lchamlari bir xil bo'lgan metall sharlar 110 V va

-40

V potensialga ega zaryadlar bir biriga tekizildi. Birinchi zaryadning potensiali (V) qanday?

21.

Alyuminiyning qarshlik termik koeffisentini aniqlash maqsadida doimiy kuchlanish ostida dastlab eriyotgan muzga solindi bunda tok kuchi 35 mA teng bo'ldi, keyin qaynayotgan suvga solinganda tok kuchi 25 mA teng bo'ldi. Alyuminiyning termik koeffisentini (mK

^{-1}

) toping.

22.

120 V kuchlanish manbaiga ulangan rezistoerdan 2,5 minutda ichida 3,6 kJ issiqlik miqdori ajralgan bo'lsa, rezistordan oqib o'tkan tok (A) kuchi qanday.

23.

Rasmdan foydalanib voltimeter ko'rsatkichini (V) toping.

24.

O'zgaruvchan elektr tarmog'iga 4

\Omega

aktiv, sig'im qarshiligi 2

\Omega

bo'lgan kondensator va induktiv qarshiligi 5

\Omega

bo'lgan g'altak ketma-ket ulangan. Agar tarmoqdagi kuchlanish effektiv qiymati 50 V bo'lsa, foydali quvvatni (W) toping.

25.

Tebranish konturida kondensator zaryadi kamaysa tok kuchini moduli qanday o'zgaradi?

26.

Ikki nuqtaviy zaryad magnit maydonida mos holda

2r

3r

radiusli aylana bo'ylab harakat qilmoqda. Agar zarralarga ta'sir etuvchi Lorens kuchlari teng bo'lsa, ularni kinetik energiyalar (

E_1/E_2

) nisbatini toping.

27.

Ikki nuqtaviy zaryad magnit maydonida mos holda

2r

3r

radiusli aylana bo'ylab harakat qilmoqda. Agar zarralarning kinetik energiyalari teng bo'lsa, ularga ta'sir etuvchi kuchlar (

F_1/F_2

) nisbatini toping.

28.

Ko'zguni qanday burchakka burilsa ko'zgudan qaytgan nur

40^\circ

ga buriladi.

29.

Botiq ko'zgudan buyumgacha bo'lgan masofa

d = 20

cm. Buyumning

k = 5/3

marta kattalashgan haqiqiy tasviri hosil bo'ldi. Botiq ko'zguning radiusini (cm) toping?

30.

Panjara doimiysi 6

\mu

m bo'lgan difraksion panjaradai 5-tartibli maksimum deyarli

90^\circ

burchak ostida ko'rinsa yorug'lik to'lqin uzunligini (

\mu

m) toping.

31.

Elektron va pozitron qo'shilganda 2 ta gamma kvanti nurlanadi. Annegilatsiyada zarralar tezligi kichik bo'lsa, hosil bo'lgan gamma kvantlarni impulsini toping?

32.

Dastlabki atomlar soni

10^{20}

bo'lgan moddaning yarm yemrlish davri 24 h agar har parchalanganda 400 keV energiya chiqsa 30 sutkada qancha energiya (MJ) chiqadi.

Topshiriqlar (33-35) va javob variantlari (A-F) ni o'zaro moslashtiring.

33-35.

Quyida berilgan elektr zanjiridagi ampermetrlarni ideal deb hisoblang.

Javob variantlari:

1,5

4,5

36.

Tomoning uzunligi 2 cm bo'lgan kub shaklidagi ikkita muz bo'lagi bor. Bu muz bo'laklari asosining yuzasi 50 cm

^2

bo'lgan idishda joylashgan 45,6 g suvga tashlandi.

a) Muz to'la erigandan so'ng suyuqlikning idish tupiga beradigan bosimini (Pa) hisoblang.

b) Suyuqlikning idish tupiga beradigan bosimi kuchinini (N) aniqlang.

37.

Slindrik idishga teng massali kerosin va suv quyildi. Hosil bo'lgan suyuqlikning umumiy baladligi 27 cm ga teng.

a) Suv ustunining balandligini (cm) aniqlang.

b) Idish dubidan 8 cm balandlikda hosil bo'ladigan bosimni (Pa) toping.

38.

Uzunligi 8 m bo'lgan qiyatekislikni qiyaligi 0,6 ga teng. Qiya tekislikni yuqori nuqtasidan massasi 20 kg bo'lgan jism pastga tusha boshladi.

a) Qiyalik etagida jism erishgan tezlikni (m/s) aniqlang.

b) Jismning pastga tushishida og'irlik kuchi bajargan ishni (J) toping.

39.

Bir atomli ideal gazga 60 kJ issiqlik miqdori berildi. Bunda uning hajmi 3 marta ortdi.

a) Gazning harorati qanday o'zgargan.

b) Gaz bajargan ishni (kJ) aniqlang.

40.

Issiqlik sig'imi 500 J/K bo'lgan idishda 5 l temperaturasi

10^\circ

C bo'lgan suv bor. Agar idishga 1 kg massali harorati

-5^\circ

C bo'lgan muz solisa.

a) Qaror topgan haroratni (

^\circ

C) toping.

b) Muz olgan issiqlik miqdori (kJ) qancha.

41.

Rasmda bir jinsli

E

elektr maydonda pratonni

A

nuqtadan

B

nuqtagacha bo'lgan

l

masofaga ko'chirilishi ko'rsatilgan.

e

— elekentar zaryad,

m

— protonning massasi.

a) Kinetik energiya o'zgarishini aniqlang.

A - B - C - A

o'tishda maydon tomonidan bajarilgan ishni (J) aniqlang.

42.

Suvdagi nurning intensivligi 27 W/m

^2

ga teng.

a) Suvdagi nurning energiya zichligini (J/m

^3

) aniqlang.

b) Bu nur suvdan to'laligicha qaytsa, yorug'lik beradigan bosimni (Pa) aniqlang.

43.

Proton induksiyasi

B

ga teng bo'lgan magnit maydonga uchib kirdi va

r

radiusli aylana bo'ylab harakatlana boshladi.

e

— elekentar zaryad,

m

— protonning massasi.

a) Aylanish chastotasini aniqlang.

b) Protonning tezligini aniqlang.

44.

Quyosh diametri

13{,}8\cdot10^8

m, quyosh va yer orasidagi masofa 150 mln km. Quyosh tasvirini olishda foydalanilayotgan linzaning fokus masofasi 50 cm.

a) Tasvir linzadan qanday masofada (mm) hosil bo'ladi.

b) Quyosh tasvirining diametri qancha (mm) bo'ladi.

45.

G'alayonlangan vadorod atomoning ionlanish energiyasi 3,4 eV ga teng. Foton yutish natijasida elektronning impuls momenti

2\hbar

ga ortdi.

a) Keying ionlanish energiyasini (eV) aniqlang.

b) Elektronning tezligi necha marta o'zgarganligini aniqlang.

Savol	A	B	C	D	E	F
33. Birinchi ampermetrdagi tok (A) kuchini aniqlang.
34. Ikkinchi ampermetrdagi tok (A) kuchini aniqlang.
35. Uchinchi ampermetrdagi tok (A) kuchini aniqlang.