Elektrostatika

Question 1

Cho‘zilmaydigan iplarga osilgan 3 ta metall sharchaga manfiy zaryad berilsa, qaysi sharcha qo‘zg‘almay qoladi?

Accepted Answer

faqat 2

Answer

2 va 3

Answer

faqat 1

Answer

1 va 2

Question 2

Akkumulyatorga ulangan kondensator zaryadlanib, $E$ energiya to‘pladi. Bunda akkumulyator qancha energiya sarfladi?

Accepted Answer

$2E$

Answer

$E$

Answer

$1{,}25E$

Answer

$1{,}5E$

Question 3

Sig‘imlari $C_1=3C_2=6C_3$ bo‘lgan kondensatorlar o‘zgarmas kuchlanish manbayiga ketma-ket ulanib to‘liq zaryadlandi. Bunda $C_3$ sig‘imli kondensator $q$ zaryad to‘plagan bo‘lsa, kalit $K$ ikkinchi holatga o‘tkazilsa $R$ qarshilikdan qancha zaryad oqib o‘tadi?

Accepted Answer

$q$

Answer

$3q$

Answer

$10q$

Answer

$9q$

Question 4

$-2e$ zaryadli ion bir jinsli elektr maydonda harakatlanmoqda. Lazer nuri ta’sirida ion bir elektronini yo‘qotsa, uning tezlanishi qanday o‘zgaradi?

Accepted Answer

2 marta kamayadi

Answer

1,5 marta ortadi

Answer

2 marta ortadi

Answer

1,5 marta kamayadi

Question 5

Sig‘imi $C$ bo‘lgan yassi havo kondensatoriga dielektrik singdiruvchanligi $\varepsilon$ bo‘lgan modda kiritildi. Bu kondensatorda $C_x$ sig‘imli kondensatorni ketma-ket ulaganda batareyaning umumiy sig‘imi $C/2$ ga teng bo‘ldi. $C_x$ sig‘imni aniqlang.

Accepted Answer

$\frac{\varepsilon C}{2\varepsilon-1}$

Answer

$\frac{2\varepsilon C}{\varepsilon-2}$

Answer

$\frac{\varepsilon C}{\varepsilon-1}$

Answer

$\frac{2\varepsilon C}{\varepsilon-1}$

Question 6

Rasmda teng miqdorda zaryadlangan $a$, $b$ nuqtaviy zaryadlar va ularning natijaviy elektr maydon kuch chiziqlari tasvirlangan. Zaryadlarning ishoralarini aniqlang.

Accepted Answer

$a(+)$, $b(+)$

Answer

$a(+)$, $b(-)$

Answer

$a(-)$, $b(+)$

Answer

$a(-)$, $b(-)$

Question 7

Zaryadlari $3\cdot 10^{-8}$ C ga teng bo‘lgan ikkita nuqtaviy zaryad havoda bir-biridan 50 cm masofada turibdi. Ularni 10 cm gacha yaqinlashtirildi. Bu jarayonda bajarilgan ishni ($\mu$J) toping.

Accepted Answer

64,8

Answer

32,4

Answer

8

Answer

4

Question 8

$4e$ nuqtaviy zaryad $-5e$ nuqtaviy zaryad bilan ta’sirlashmoqda. Sistemaning ta’sirlashuv potensial energiyasi qanday ishoraga ega?

Accepted Answer

manfiy

Answer

musbat

Answer

nolga teng

Answer

turli ishorali bo‘lishi mumkin

Question 9

Rasmda 1-holatdagi kondensatorning sig‘imi $C_1$, ikkinchisiniki $C_2$ va $\varepsilon=2$ bo‘lsa, $\frac{C_1}{C_2}$ ifodaning qiymatini toping.

Accepted Answer

9/8

Answer

8/9

Answer

8/17

Answer

17/8

Question 10

Zaryadli jismga ta’sir etuvchi 2 ta kuchning natijaviysi 32 mN ga teng va gorizontal yo‘nalgan. Agar og‘irlik kuchi 24 mN bo‘lsa, elektr maydon ta’sirining modulini (mN) aniqlang.

Accepted Answer

40

Answer

56

Answer

12

Answer

64

Elektrostatika

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