Consider the following statements (A) and (B) and identify the correct answer.(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.

Question

1. (A) and (B) both are correct. 2. (A) and (B) both are incorrect. 3. (A) is correct and (B) is incorrect. 4. (A) is incorrect but (B) is correct.

Doubtly AI · Accepted Answer

Answer: 3. (A) is correct and (B) is incorrect. Key idea: a Zener diode regulates voltage only in reverse-bias breakdown, and the barrier potential of a p-n junction is larger than the range given. (A) is correct: a Zener works as a voltage regulator when reverse biased, in its breakdown region, where the voltage stays almost constant. (B) is incorrect: the barrier potential is about 0.3 V for germanium and about 0.7 V for silicon, so it is not 0.1 V to 0.3 V. So (A) is correct and (B) is incorrect: option 3.

Consider the following statements (A) and (B) and identify the correct answer.(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.

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