application of diode and zener breakdown questions with solutions

Showing 1–10 of 46 questions

• MCQeasysemiconductorapplication of diode and zener breakdown

  A light emitting diode (LED) is fabricated using GaAs semiconducting material whose band gap is 1.42 eV. The wavelength of light emitted from the LED is:

  Options

  • Option A

    650 nm

  • Option B

    1243 nm

  • Option C

    875 nm

  • Option D

    1400 nm

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• MCQeasysemiconductorapplication of diode and zener breakdown

  A 12 V supply feeds an ideal 5 V Zener through 350 Ω. No load is connected. Zener current is:

  Options

  • Option A

    10 mA

  • Option B

    20 mA

  • Option C

    35 mA

  • Option D

    5 mA

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  A 12 V source feeds a network with a 4 Ω resistor from the top node to A. From A to the bottom node there are two 4 Ω branches, one directly and one through an ideal forward-biased diode to B and then 4 Ω to the bottom. Statements: (A) ammeter current is 2 A; (B) net resistance is 8 Ω; (C) voltage across BC is 4 V; (D) diode current is 1 A. Choose the correct option.

  

  Options

  • Option A

    Only ABC are correct

  • Option B

    Only ACD are correct

  • Option C

    Only ABD are correct

  • Option D

    Only AD are correct

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  JEE Mains 2025 23 Jan Morning Shift

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• MCQeasysemiconductorapplication of diode and zener breakdown

  A photodiode used as a light detector is normally operated in:

  Options

  • Option A

    Strong forward bias

  • Option B

    Reverse bias

  • Option C

    Zero bias only

  • Option D

    Zener breakdown necessarily

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  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 (X/8) eV. The value of X is: (Given, h = 6.6 × 10⁻³⁴ J s, e = 1.6 × 10⁻¹⁹ C)

  Options

  • Option A

    15

  • Option B

    11

  • Option C

    13

  • Option D

    21

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• MCQeasysemiconductorapplication of diode and zener breakdown

  Two p-n junction diodes D₁ and D₂ are connected as shown in figure. A and B are input signals and C is the output. The given circuit will function as a ____.

  

  Options

  • Option A

    OR Gate

  • Option B

    NOR Gate

  • Option C

    NAND Gate

  • Option D

    AND Gate

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  Two ideal diodes have anodes joined at output Y and cathodes connected to positive-logic inputs A and B. A resistor pulls Y to +V. The circuit behaves as:

  Options

  • Option A

    OR

  • Option B

    AND

  • Option C

    NOT

  • Option D

    NAND

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  A 15 V source is regulated to 5 V. Load current is 20 mA and Zener must carry at least 5 mA. Maximum series resistance is:

  Options

  • Option A

    200 Ω

  • Option B

    400 Ω

  • Option C

    500 Ω

  • Option D

    2 kΩ

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  In the given circuit, the voltage across load resistance (Rₗ) is:

  

  Options

  • Option A

    8.75 V

  • Option B

    9.00 V

  • Option C

    8.50 V

  • Option D

    14.00 V

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• MCQeasysemiconductorapplication of diode and zener breakdown

  For an ideal full-wave rectifier with sinusoidal peak $V_m,$ average output is:

  Options

  • Option A

    $V_m/π$

  • Option B

    2$V_m/π$

  • Option C

    $V_m/2$

  • Option D

    $V_m/√2$

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