Вариант №6 I. Izolyatorlar

Вариант №6

I.

Izolyatorlar.

Juda yuqori qarshilikka ega materiallarga izolyator deyiladi. Elektr toki izolyatorlardan katta qiyinchilik bilan o'tadi.

Eng keng tarqalgan izolyatorlar havo, qog'oz, kauchuk, plastmassa.

Har qanday izolyatorga yetarlicha yuqori kuchlanish qo'llanilganda tok o'tkazishi mumkin. Izolyatorlarga ularni o'tkazishi uchun katta miqdordagi elektr energiyasi kiritish kerak. Izolyatorning qarshiligi qanchalik yuqori bo'lsa, qo'llaniladigan kuchlanish shuncha ko'p bo'lishi kerak.

Izolyator kuchlanish manbasiga ulanganda, u elektr zaryadini saqlaydi va izolyatorda potentsial hosil bo'ladi. Shunday qilib, izolyator ikkita asosiy funktsiyaga ega:

o'tkazuvchan simlarni izolyatsiyalash va shu bilan ular orasidagi qisqa tutashuvni oldini olish

kuchlanish manbai qo'llanilganda elektr zaryadini saqlash uchun.

II.

diagram, coefficient, transformer, to transfer, load resistance, wire conductors, frequency, charge, apply

diagramma, koeffitsient, transformator, uzatish, yuklanish qarshiligi, sim o'tkazgichlari, chastota, zaryad, qo'llash

III.

1.B

2. A and C

IV.

1. Izolyatorlarga ularni o'tkazishga imkon beradigan katta elektr energiyasi qo'llanilishi kerak. 2. Elektr energiyasi izolyatorlardan katta qiyinchilik bilan o'tadi.

V.

1. B

2. B

VI.

1. 
   What materials are called insulators?
   

Some common insulator materials are glass, plastic, rubber, air, and wood.

2. 
   What are the most common insulators?
   

Fiberglass is the most common insulation used in modern times.

3. 
   What are the two main functions of insulators?
   

• 
  Enhancer-blocking insulators prevent distal enhancers from acting on the promoter of neighbouring genes.
  
• 
  Barrier insulators prevent silencing of euchromatin by the spread of neighbouring heterochromatin.
  

VII.

1. A

2. C

VIII.

1. 
   The most common insulators are air, plastics, paper, rubber.
   

IX.

1.Currents of great value must be applied to insulators in order to make them conduct



X.

1. Materials with high resistance are called insulators.

2. The current passes through the insulators with difficulty.