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Electronic Devices question

2016 · Shift 0 · Q38
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Electronic Devices question

2016 · Shift 0 · Q38

JEE MainPhysicsElectronic DevicesMCQ+4 / −1
Identify the semiconductor devices whose characteristics are given below, in the order (a),(b),(c),(d)(a), (b), (c), (d)(a),(b),(c),(d) : JEE Main 2016 (Offline) Physics - Semiconductor Question 189 English
  1. A
    Simple diode, Zener diode, Solar cell, Light dependent resistance
  2. B
    Zener diode, Simple diode, Light dependent resistance, Solar cell
  3. C
    Solar cell, Light dependent resistance, Zener diode, simple diode
  4. D
    Zener diode, Solar cell, simple diode, Light dependent resistance
View written solutionFree

Correct answer: A

  1. To identify the devices, we match the typical current-voltage / resistance-light characteristics of common semiconductor devices.

  2. Standard identifying features:

    (a) Simple diode

    • In forward bias, current remains very small until the knee voltage, then rises rapidly.
    • In reverse bias, current is very small.
    • So its characteristic is the usual rectifying III-VVV curve.

    (b) Zener diode

    • In forward bias, it behaves like an ordinary diode.
    • In reverse bias, after the breakdown voltage, current increases sharply while voltage remains nearly constant.
    • So this is the reverse-breakdown characteristic.

    (c) Solar cell

    • A solar cell provides current even at zero applied voltage due to incident light.
    • Its III-VVV graph lies in the fourth quadrant for power delivery.
    • This is a distinctive characteristic of a solar cell.

    (d) Light dependent resistance (LDR)

    • Resistance decreases as intensity of incident light increases.
    • So the graph is a decreasing resistance vs illumination curve.

  3. Therefore, the order (a),(b),(c),(d)(a),(b),(c),(d)(a),(b),(c),(d) is:

Simple diode, Zener diode, Solar cell, Light dependent resistance\text{Simple diode, Zener diode, Solar cell, Light dependent resistance}Simple diode, Zener diode, Solar cell, Light dependent resistance

  1. This matches Option A.

  2. Comparison with stored correct answer:

  • Stored correct answer: A
  • Derived answer: A
  • Hence, they agree.
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