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Semiconductor Electronics

JEE Main 2024 (Online) 1st February Evening ShiftMCQEasy📈 Topic in 26% papers+4−1
Ques. 1JEE Main 2024, 1 February (Evening Shift)

Conductivity of a photodiode starts changing only if the wavelength of incident light is less than 660 nm. The band gap of photodiode is found to be ( X8 )eV. The value of X is : (Given, h=6.6 10-34 Js, e=1.6 10-19 C)

  1. 11
  2. 13
  3. 15
  4. 21

Answer

(3) 15

Solution

conductivity changes only when photon energy Eg (i.e. 660 nm)

Eg= hc = 6.6 10-34 3 108660 10-9 1.6 10-19 eV

= 31.6 eV=1.875 eV= 158 eV

X=15

Answer: (3)

Keep practising — Semiconductor Electronics

Ques. 2JEE Main 2024, 31 January (Morning Shift)

Identify the logic operation performed by the given circuit. [figure]

  1. AND
  2. NOR
  3. OR
  4. NAND
Ques. 3JEE Main 2024, 31 January (Evening Shift)

[figure] The output of the given circuit diagram is -

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4JEE Main 2024, 30 January (Morning Shift)

A Zener diode of breakdown voltage 10 V is used as a voltage regulator as shown in the figure. The current through the Zener diode is : [figure]

  1. 0
  2. 30 mA
  3. 20 mA
  4. 50 mA
Ques. 5JEE Main 2024, 30 January (Evening Shift)

[figure] In the given circuit, the voltage across load resistance (RL) is :

  1. 8.75 V
  2. 9.00 V
  3. 8.50 V
  4. 14.00 V
Ques. 6JEE Main 2024, 29 January (Morning Shift)

In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of Iz ? [figure]

  1. 3.3 mA
  2. 10 mA
  3. 5.5 mA
  4. 7 mA
Ques. 7JEE Main 2024, 29 January (Evening Shift)

The truth table for this given circuit is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 27 January (Morning Shift)

Which of the following circuits is reverse - biased?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9JEE Main 2024, 27 January (Evening Shift)

The truth table of the given circuit diagram is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

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