Nazoratishlari va laboratoriyala r

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LABORATORIYA ISHI-4
MAVZU: YARIM OTKAZGICHLI DIODNING VOLT – AMPER TAVSIFINI O‘RGANISH.
Ishning maqsadi: Yarim otkazgichli dioddan o‘tuvchi tok kuchining qo‘yilgan kuchlanishga bog‘liqligini o‘rganish.
Kerakli asboblar: 1) yarimo‘tkazgichli diod (kolodkada); 2) o‘zgarmas tok manbayi (36–42 V);
3) kalit; 4) o‘tkazgich simlari; 5) milliampermetr; 6) reostat; 7) voltmetr
Ishning bajarilishi

1. 
   Kerakli asboblar to‘planib, 2-rasmdagi chizma bo‘yicha elektr zanjiri yig‘iladi.
   
2. 
   O chiq (zanjir uzilgan) holatga keltiriladi.
   

3.Reostat jildirgichini surib chiqishda 0 V bo‘ladigan holatga qo‘yiladi. 4. Kalit ulanadi.

5. 
   Reostat jildirgichini surib, tashqi zanjirga beriladigan kuchlanish orttirib boriladi. Voltmetr va ampermetr ko‘rsatishlari yozib boriladi.
   
6. 
   O‘lchash natijalari jadvalga kiritiladi.
   

U, V
I, A

5. 
   Kalit ochiq (zanjir uzilgan) holatga keltiriladi.
   
6. 
   Tok manbaining qutblari almashtirilib ulanadi va tajriba yuqorida keltirilgan 3-6-ko‘rsatmalar bo’yicha takrorlanadi.
   
7. 
   Natijalariga ko‘ra yarimotkazgichli dioddan o‘tuvchi tok kuchining qo‘yilgan kuchlanishga bog‘liqlik grafigi chiziladi.
   
8. 
   Yarim o‘tkazgichli dioddan to‘g‘ri p–n o‘tish va teskari p–n o‘tish yo‘nalishda o‘tadigan tok kuchining qo‘yilgan kuchlanishga bog‘liqligi 3-rasmdagi grafikda keltirilgan. Hisoblash