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Semiconductor Electronics

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Energy Bands in Solids

Subtopic

Energy Bands in Solids under Semiconductor Electronics for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following energy band diagrams correctly represents the electronic structure of a conductor?

    A.

    Valence band and conduction band overlap

    B.

    Large gap between valence and conduction bands

    C.

    Valence band is completely empty

    D.

    Small gap of exactly 1.1 eV1.1\text{ eV}

  2. 2.

    In an insulator, the forbidden energy gap (EgE_g) is typically found to be:

    A.

    Eg<0.1 eVE_g < 0.1\text{ eV}

    B.

    Eg1 eVE_g \approx 1\text{ eV}

    C.

    Eg>3 eVE_g > 3\text{ eV}

    D.

    Eg=0 eVE_g = 0\text{ eV}

  3. 3.

    At absolute zero temperature (0 K0\text{ K}), an intrinsic semiconductor behaves as:

    A.

    A superconductor

    B.

    A perfect insulator

    C.

    A perfect conductor

    D.

    A p-type semiconductor

Download the worksheet for Semiconductor Electronics - Energy Bands in Solids to practice offline. It includes additional chapter-level practice questions.

Intrinsic and Extrinsic Semiconductors

Subtopic

Intrinsic and Extrinsic Semiconductors under Semiconductor Electronics for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In an n-type semiconductor, the majority charge carriers are:

    A.

    Holes

    B.

    Positive ions

    C.

    Electrons

    D.

    Protons

  2. 2.

    When the temperature of an intrinsic semiconductor is increased, its electrical resistance:

    A.

    Increases

    B.

    Decreases

    C.

    Remains constant

    D.

    Increases for Silicon but decreases for Germanium

  3. 3.

    Which of the following elements can be used as a dopant to create a p-type semiconductor from a pure Silicon crystal?

    A.

    Phosphorus

    B.

    Indium

    C.

    Arsenic

    D.

    Antimony

Download the worksheet for Semiconductor Electronics - Intrinsic and Extrinsic Semiconductors to practice offline. It includes additional chapter-level practice questions.

p-n Junction Diode

Subtopic

p-n Junction Diode under Semiconductor Electronics for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The direction of the 'diffusion current' in an unbiased p-n junction is:

    A.

    From n-side to p-side

    B.

    From p-side to n-side

    C.

    Zero, as no current flows

    D.

    Dependent on the temperature only

  2. 2.

    Which of the following materials is typically used to dope pure Silicon to create a p-type semiconductor?

    A.

    Phosphorus

    B.

    Arsenic

    C.

    Antimony

    D.

    Indium

  3. 3.

    In a p-n junction diode, the 'barrier potential' is primarily caused by the accumulation of:

    A.

    Free electrons in the p-region

    B.

    Holes in the n-region

    C.

    Immobile ions near the junction

    D.

    Mobile charge carriers at the center

Download the worksheet for Semiconductor Electronics - p-n Junction Diode to practice offline. It includes additional chapter-level practice questions.

Diode as a Rectifier

Subtopic

Diode as a Rectifier under Semiconductor Electronics for Grade 12 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which component is most commonly used in a filter circuit to smooth out the pulsating DC output from a rectifier?

    A.

    A high resistance in series

    B.

    A p-n junction diode in reverse bias

    C.

    A capacitor connected in parallel with the load

    D.

    A step-up transformer

  2. 2.

    During which part of the input cycle does a diode conduct in a standard half-wave rectifier circuit?

    A.

    Only when the diode is forward biased

    B.

    Only when the diode is reverse biased

    C.

    Throughout the entire 360360^{\circ} cycle

    D.

    Only during the negative half-cycle

  3. 3.

    If an AC supply with a frequency of 50 Hz50\text{ Hz} is connected to a half-wave rectifier, what will be the frequency of the output ripple?

    A.

    25 Hz25\text{ Hz}

    B.

    100 Hz100\text{ Hz}

    C.

    50 Hz50\text{ Hz}

    D.

    0 Hz0\text{ Hz}

Download the worksheet for Semiconductor Electronics - Diode as a Rectifier to practice offline. It includes additional chapter-level practice questions.

Semiconductor Electronics - Class 12 Physics (CBSE) | Krit.club