Elektrostatik maydon — Masalalar yechish — 10-sinf Fizika test savollari

1.Zaryadlangan sharcha elektr maydon kuchi ta'sirida ko'chirilganda, elektr kuchlarning bajargan ishi nimaga teng bo'ladi?

• A)Sharchaning og'irlik kuchiga
• B)Sharchaning impulsiga
• C)Sharcha kinetik energiyasining o'zgarishiga
• D)Sharchaning zaryadiga

2.Zaryadlangan zarrachani A nuqtadan B nuqtaga ko'chirishda elektr maydon kuchlarining bajargan ishi qanday formula bilan ifodalanadi?

• A)A = q(φA–φB)
• B)A = qE·d
• C)A = mgh
• D)A = qU²

3.Namunaviy masalada sharchaning massasi va zaryadi mos ravishda qancha qilib berilgan?

• A)1 g va 100 nC
• B)100 g va 1 nC
• C)10 g va 100 nC
• D)10 g va 10 nC

4.1-masalada sovun pufakchasining zaryadi va massasi mos ravishda qancha qilib berilgan?

• A)2,22·10⁻¹⁰ C va 0,01 g
• B)0,01·10⁻¹⁰ C va 2,22 g
• C)2,22·10⁻¹⁰ C va 1 g
• D)22,2·10⁻¹⁰ C va 0,01 g

5.Yer sharining sig'imini hisoblashda uning radiusi qancha deb olinishi kerak?

• A)3200 km
• B)12800 km
• C)6400 km
• D)6400 m

6.Namunaviy masalada: massasi 10 g, zaryadi 10 nC bo'lgan sharcha potensiali 100 V bo'lgan nuqtadan potensiali 0 bo'lgan nuqtaga ko'chirilganda, agar A nuqtadagi tezligi 2 cm/s bo'lsa, B nuqtadagi tezligi taxminan nechaga teng bo'ladi?

• A)2,4 cm/s
• B)0,7 cm/s
• C)2,0 cm/s
• D)1,4 cm/s

7.1-masalada zaryadi 2,22·10⁻¹⁰ C, massasi 0,01 g bo'lgan sovun pufakchasi plastinkalar oralig'i 5 cm bo'lgan kondensator maydonida muallaq turibdi. Kondensator plastinkalari orasidagi potensiallar farqi taxminan nechaga teng?

• A)2207 V
• B)22072 V
• C)220720 V
• D)44144 V

8.2-masalada 792 V potensialgacha zaryadlangan sharcha zaryadining sirt zichligi 3,33·10⁻⁷ C/m² bo'lsa, sharchaning radiusi taxminan nechaga teng?

• A)4,2 cm
• B)0,42 cm
• C)21 cm
• D)2,1 cm

9.3-masalada elektron tezligini 10 Mm/s dan 30 Mm/s gacha oshirgan maydon nima deb ko'rsatilgan?

• A)Magnit maydon
• B)Gravitatsion maydon
• C)Elektr maydon
• D)Elektromagnit to'lqin

10.3-masalada elektron tezligi 10 Mm/s dan 30 Mm/s gacha oshganda, uning ko'chishining boshlang'ich va oxirgi nuqtalari orasidagi potensiallar farqi taxminan nechaga teng (me = 9,1·10⁻³¹ kg, e = 1,6·10⁻¹⁹ C)?

• A)455 V
• B)2275 V
• C)4550 V
• D)1137 V