Мавзу: G‘altakning induktivligini, to‘la kuchlanish va tok orasidagi faza siljishini hamda muhitning magnit singdiruvchanligini aniqlash

Ishni bajarish tartibi:

• 
  
  
  
  Y orug`lik manbaiga reostat orqali 30 V kuchlanish bering.
  
• 
  Fotoelementni yorug`lik manbaidan 15 sm uzoqlikda o`rnating.
  
• 
  R qarshilik orqali 10 V oralig’ida, fotoelementning anodi va katodi orasidagi kuchlanish tushishini o`zgartirib borib, milliampermetr orqali fototokning qiymati IF ni o`lchab boring.
  
• 
  Fotoelementni yorug`lik manbaidan 30, 45 sm masofaga qo`yib, tajribani takrorlang.
  
• 
  Olingan natijalarni quyidagi jadvalga yozing.
  

1-jadval

Ua	0	10	20	30	40	50	60	70	80	90	100
If

• 
  Jadval asosida abssissa o`qi bo`yicha U_a qiymatini va ordinata o`qi bo`yicha fototokning qiymati I_F ni qo`yib fotoelementning volt-amper xarakteristikalarini chizing.
  
• 
  Grafikni interpolyatsiyalash yo`li bilan V<sub>g</sub> to`xtatiluvchi potensialning qiymatini aniqlang.
  
• 
  (1)-formuladan foydalanib fotoelektronlarning tezligini aniqlang.
  
• 
  (2) foydalanib katod materiali uchun elektronlarning chiqish ishini aniqlang.
  

(v - ning qiymatini o’qituvchidan so`rab oling).
Nazоrat savоllari

1. 
   Fotoeffekt hodisasi nima va uning qonunlarini tushuntiring.
   
2. 
   Ichki va tashqi fotoeffekt hodisasining farqi nimada?
   
3. 
   Eynshteyn tenglamasini yozing va tushuntirib bering.
   
4. 
   Fotoeffektning qizil chegarasi nima va u qanday aniqlanadi?
   
5. 
   Fotoelement qanday tuzilgan?
   

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