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  • Question

  • Assertion (A): The conductivity of p type semiconductor is higher than that of intrinsic semiconductor.

    Reason (R): The addition of donor impurity creates additional energy levels below conduction band.


  • Options
  • A. Both A and R are true and R is correct explanation of A
  • B. Both A and R are true but R is not a correct explanation of A
  • C. A is true but R is false
  • D. A is false but R is true

  • Correct Answer
  • Both A and R are true but R is not a correct explanation of A 

    Explanation
    A refers to type semiconductor while R refers to n type semiconductor. Both A and R are correct but independent.

    More questions

    • 1. Bellows converts

    • Options
    • A. pressure difference into displacement
    • B. pressure difference into voltage
    • C. displacement into pressure difference
    • D. either (a) or (c)
      • Discuss
    • 2. The noise figure of multicavity klystron amplifier is very low

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. Let JCOKE = 98 and LPEPSI = 42 Consider the statement

      IF (JCOKE - 3 * LPEPSI) 5, 6, 7
      5 JCOKE = JCOKE + 5
      6 JCOKE = JCOKE + 8
      7 JCOKE = JCOKE + 11

      The value of JCOKE after the execution of above statement will be

    • Options
    • A. 103
    • B. 106
    • C. 109
    • D. none of the above
      • Discuss
    • 4. Read the following statements about files in Pascal

      1. A file is a data structure which consists of a sequence of components of the same type.
      2. The number of components in a file is variable.
      3. The components in a file can be accessed only sequentially starting from the beginning of the file.
      Which of the above are correct?

    • Options
    • A. All
    • B. 1 and 2 only
    • C. 2 and 3 only
    • D. 1 and 3 only
      • Discuss
    • 5. In a backward wave oscillator the wave travelling along the line winds itself back and forth

    • Options
    • A. True
    • B. False
      • Discuss
    • 6. In the series circuit shown in figure, for series resonance, the value of the coupling coefficient, K will be

    • Options
    • A. 0.25
    • B. 0.5
    • C. 0.1
    • D. 1
      • Discuss
    • 7. Match the following:

      List I List II
      A. hie 1. siemens
      B. hoe 2. no units
      C. hfe 3. ohms


    • Options
    • A. A-1, B-2, C-3
    • B. A-3, B-1, C-2
    • C. A-2, B-1, C-3
    • D. A-3, B-2, C-1
      • Discuss
    • 8. The number of leads in a power semiconductor diode are

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. 2 or 3
      • Discuss
    • 9. As compared to their values in free space

    • Options
    • A. velocity of electric wave in dielectric is smaller but wave length of electric wave is more
    • B. both velocity and wave length of electric wave in dielectric are higher
    • C. both velocity and wave length of electric wave in dielectric are smaller
    • D. wave length of electric wave is less but velocity is more in dielectric
      • Discuss
    • 10. Match the following:

      List I List II
      A. 1. a constant
      B. e-j? 2. exponential function
      C. 3. t multiplied exponential function
      D. k ?(?) 4. rectangular pulse
      5. impulse function


    • Options
    • A. A-4, B-5, C-3, D-1
    • B. A-4, B-5, C-3, D-2
    • C. A-3, B-4, C-2, D-1
    • D. A-3, B-4, C-2, D-5
      • Discuss

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