Medium MCQ +4 / -1 PYQ · JEE Mains 2023

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R

Assertion A : Photodiodes are used in forward bias usually for measuring the light intensity.

Reason R : For a p-n junction diode, at applied voltage V the current in the forward bias is more than the current in the reverse bias for $\mathrm{|{V_z}| > \pm v \ge |{v_0}|}$ where $\mathrm{v_0}$ is the threshold voltage and $\mathrm{V_z}$ is the breakdown voltage.

In the light of the above statements, choose the correct answer from the options given below

  1. A Both A and R are true but R is NOT the correct explanation of A
  2. B A is true but R is false
  3. C Both A and R are true and R is the correct explanation of A
  4. D A is false but R is true Correct answer

Solution

Photodiodes are used in reverse bias therefore the assertion is incorrect.

About this question

Subject: Physics · Chapter: Electronic Devices · Topic: Semiconductors

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