Semiconductor Electronics

Bihar Board Class 12 · Physics · 39 past questions

1. Q1 2026 Set A2019

   Write truth table and Boolean expression of OR and AND get.

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2. Q2 2026 Set A

   In a transistor

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3. Q3 2026 Set A

   In a half-wave rectifier, if the input frequency is 50 Hz, then output frequency will be

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4. Q4 2026 Set A

   Which device is used as a voltage regulator ?

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5. Q5 2026 Set A

   Semiconductor is damaged by the strong current due to

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6. Q6 2026 Set A

   The valency of impurity element to convert a germanium crystal into a $p$-type semiconductor is

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7. Q7 2025 Set D

   When boron is mixed as impurity in silicon, the resultant matter is

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8. Q8 2025 Set D

   In n-type semiconductor the minority charge carrier is/are

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9. Q9 2025 Set D

   Which logic gate's output is true only if the inputs are different?

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10. Q10 2025 Set D

    Reverse biased diode is

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11. Q11 2025 Set D20192017

    The Boolean expression for NAND gate is

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12. Q12 2024 Set A

    $P$-$N$ junction diode is used as

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13. Q13 2024 Set A

    Instrument used to increase input voltage/current is called

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14. Q14 2024 Set A

    If in a logic gate output ($Y$) is obtained by the product of its both inputs ($A \cdot B$), then the gate is

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15. Q15 2024 Set A

    The width of forbidden energy gap in the semiconductor is approximately

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16. Q16 2024 Set A

    The equivalent number of decimal number 27 into binary number system will be

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17. Q17 2024 Set A

    In full wave rectifier, if input frequency is 50 Hz, then output frequency will be

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18. Q18 2024 Set A

    Convert binary number $(1101)_2$ into decimal system.

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19. Q19 2023 Set F2017

    Diode is used as-

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20. Q20 2023 Set F

    The binary equivalent of 25 is

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21. Q21 2023 Set F

    The temperature coefficient of a semi-conductor is

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22. Q22 2023 Set F

    The impurity element used for p-type semiconductor is

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23. Q23 2023 Set F

    →| is the symbol of

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24. Q24 2023 Set F

    Unit of amplification factor of transistor is

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25. Q25 2023 Set F

    Which one of the following logic gates is universal logic gate?

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26. Q26 2022 Set I

    Binary number of decimal number $(8)_{10}$ is

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27. Q27 2022 Set I

    Symbol of NAND gate is (with a figure)

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28. Q28 2021 Set A

    Boolean expression for NOR gate is

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29. Q29 2021 Set A

    The decimal number of binary number $(1001)_2$ is

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30. Q30 2021 Set A

    A $p$-type semiconductor is

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31. Q31 2021 Set A

    Donor impurity atom has valency

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32. Q32 2021 Set A

    Which of the following is correct ?

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33. Q33 2021 Set A

    Which of the following is correct for fundamental gate ?

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34. Q34 2019

    With the increase on temperature the resistivity of semiconductor

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35. Q35 2019

    Explain with the help of a labelled diagram the working of a transistor as an oscillator.

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36. Q36 2018

    A semi-conductor is cooled from $T_1K$ to $T_2K$ ,then its resistance will

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37. Q37 2018

    If the current constant for a transistor are $\alpha$ and $\beta$ then…

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38. Q38 2017

    For n-type Germanium, impurity doped in Germanium is-

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39. Q39 2017

    Explain-
    (i) Zener diode
    (ii) LED (light emitting diode). (with a figure)

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