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Solution


Q.

Consider the following statements (A) and (B) and identify the correct answer.                     [2021]
(A) A zener diode is connected in reverse bias, when used as a voltage regulator.
(B) The potential barrier of p–n junction lies between 0.1 V to 0.3 V.    
1 (A) is incorrect but (B) is correct.  
2 (A) and (B) both are correct.  
3 (A) and (B) both are incorrect.  
4 (A) is correct and (B) is incorrect.  

Ans.

(2)

Yes, zener diode is connected in reverse bias as it is used as voltage regulator.

The potential barrier of p-n junction

For Ge; Vo=0.3V ; Si; Vo=0.7V