Semiconductors & Communication · JEE Main previous year questions

2022 29 questions

1. Q352022 · 26 Jun 2022 · Shift 2

   Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : If we move from poles to equator, the direction of acceleration due to gravity of earth always points towards the center of earth without any variation in its magnitude. Reason R : At equator, the direction of acceleration due to the gravity is towards the center of earth. In the light of above statements, choose the correct answer from the options given below:

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

   Answer: D

2. Q462022 · 25 Jun 2022 · Shift 1

   The photodiode is used to detect the optical signals. These diodes are preferably operated in reverse biased mode because :

   1. A.fractional change in majority carriers produce higher forward bias current
   2. B.fractional change in majority carriers produce higher reverse bias current
   3. C.fractional change in minority carriers produce higher forward bias current
   4. D.fractional change in minority carriers produce higher reverse bias current
   Show answer

   Answer: D

3. Q502022 · 25 Jun 2022 · Shift 2

   Match List I with List II $$\begin{array}{llll}& \text{List - I}& & \text{List -II}\\ \text{A.}& \text{Facsimile}& \text{I.}& \text{Static Document Image}\\ \text{B.}& \text{Guided media Channel}& \text{II.}& \text{Local Broadcast Radio}\\ \text{C.}& \text{Frequency Modulation}& \text{III.}& \text{Rectangular wave}\\ \text{D.}& \text{Digital Signal}& \text{IV.}& \text{Optical Fiber}\end{array}$$ Choose the correct answer from the following options:

   1. A.A-IV, B-III, C-II, D-I
   2. B.A-I, B-IV, C-II, D-III
   3. C.A-IV, B-II, C-III, D-I
   4. D.A-I, B-II, C-III, D-IV
   Show answer

   Answer: B

4. Q602022 · 25 Jun 2022 · Shift 2· Numerical answer
   
   Show answer

   Answer: 15