Q140 / 200 · NEET 2021 · Physics

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.

  • A
    (A) and (B) both are correct.
  • B
    (A) and (B) both are incorrect.
  • Correct answer
    C
    (A) is correct and (B) is incorrect.
  • D
    (A) is incorrect but (B) is correct.

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 0.6 V−0.7 V and for germanium is about 0.3 V−0.35 V Hence, statement A is correct but statement B is wrong.

Hence, the correct answer is option: 'C'.

Relevant Questions