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NEET 2021
Exam
NEET
Year
2021
Subject
Physics
Chapter
Semiconductors

NEET 2021 · Physics · Semiconductors

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

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−np - n junction lies between 0.1V0 . 1V to 0.3V0 . 3V.

Options

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

Correct answer

C. (A) is correct and (B) is incorrect.

Step-by-step solution

When Zener diode is forward biased, it behaves like an ordinary diode and when reversing biased, it will be a voltage stabilizer. Also, at room temperature, the voltage across the depletion layer for silicon is about 0.6V−0.7V0 . 6V - 0 . 7V and for germanium is about 0.3V−0.35V0 . 3V - 0 . 35V Hence, statement AA is correct but statement BB is wrong.
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