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Semiconductor Electronics

91 questions · Physics · NEET
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Semiconductor Electronics

91 questions · Physics · NEET

  1. A full wave rectifier circuit with diodes (D1​) and (D2​) is shown in the figure. If input supply voltage Vin ​=220sin(100πt) volt, then at t=15msec Includes diagram2025 · Q150 · MCQ
  2. The output ( Y ) of the given logic implementation is similar to the output of an/a ________ gate. Includes diagram2025 · Q160 · MCQ
  3. A logic circuit provides the output Y as per the following truth table : The expression of the output Y is : Includes diagram2024 · Q153 · MCQ
  4. Consider the following statements A and B and identify the correct answer : A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph. B. In a reverse biased pn junction diode, the current measured in (μA)… Includes diagram2024 · Q163 · MCQ
  5.  The output ( Y ) of the given logic gate is similar to the output of an/a  Includes diagram2024 · Q183 · MCQ
  6. The I-V characteristics shown above are exhibited by a Includes diagram2024 · Q167 · MCQ
  7. When the output of an OR gate is applied as input to a NOT gate, then the combination acts as a2024 · Q179 · MCQ
  8. The output Y for the inputs A and B of the given logic circuit is: Includes diagram2024 · Q198 · MCQ
  9. On the basis of electrical conductivity, which one of the following material has the smallest resistivity?2023 · Q132 · MCQ
  10. The given circuit is equivalent to: Includes diagram2023 · Q138 · MCQ
  11. A p-type extrinsic semiconductor is obtained when Germanium is doped with:2023 · Q150 · MCQ
  12. Given below are two statements: Statement I : Photovoltaic devices can convert optical radiation into electricity. Statement II : Zener diode is designed to operate under reverse bias in breakdown region. In the light of the above…2023 · Q132 · MCQ
  13. A full wave rectifier circuit consists of two p-n junction diodes, a centre-tapped transformer, capacitor and a load resistance. Which of these components remove the ac ripple from the rectified output?2023 · Q150 · MCQ
  14. For the following logic circuit, the truth table is: Includes diagram2023 · Q162 · MCQ
  15. Identify the equivalent logic gate represented by the given circuit Includes diagram2022 · Q154 · MCQ
  16. The incorrect statement about the property of a Zener diode is :2022 · Q167 · MCQ
  17. In the given circuits (a), (b) and (c), the potential drop across the two p-n junctions are equal in Includes diagram2022 · Q129 · MCQ
  18. As the temperature increases, the electrical resistance2022 · Q131 · MCQ
  19. In half wave rectification, if the input frequency is 60 Hz, then the output frequency would be2022 · Q134 · MCQ
  20. The truth table for the given logic circuit is Includes diagram2022 · Q163 · MCQ
  21. Consider the following statements (A) and (B) and identify the correct answer. (A) A Zener diode is connected in reverse bias, when used as a voltage regulator. (B) The potential barrier of p-n junction lies between 0.1 V to 0.3 V.2021 · Q143 · MCQ
  22. The electron concentration in an n-type semiconductor is the same as hole concentration in a p-type semiconductor. An external field (electric) is applied across each of them. Compare the currents in them.2021 · Q145 · MCQ
  23. For the given circuit, the input digital signals are applied at the terminals A, B and C. What would be the output at the terminal y? Includes diagram2021 · Q174 · MCQ
  24. The increase in the width of the depletion region in a p-n junction diode is due to :2020 · Q152 · MCQ
  25. For the logic circuit shown, the truth table is : Includes diagram2020 · Q158 · MCQ
  26. For a p-type semiconductor, which of the following statements is true?2019 · Q117 · MCQ
  27. The correct Boolean operation represented by the circuit diagram drawn is : Includes diagram2019 · Q158 · MCQ
  28. In the combination of the following gates the output Y can be written in terms of inputs A and B as Includes diagram2018 · Q135 · MCQ
  29. In a p-n junction diode, change in temperature due to heating2018 · Q137 · MCQ
  30. Which one of the following represents forward bias diode ?2017 · Q142 · MCQ
  31. The given electrical network is equivalent to Includes diagram2017 · Q143 · MCQ
  32. To get output 1 for the following circuit, the correct choice for the input is Includes diagram2016 · Q138 · MCQ
  33. Consider the junction diode as ideal. The value of current flowing through AB is Includes diagram2016 · Q139 · MCQ
  34. The given circuit has two ideal diodes connected as shown in the figure. The current flowing through the resistance R1 will be Includes diagram2016 · Q138 · MCQ
  35. What is the output Y in the following circuit, when all the three inputs A, B, C are first 0 and then 1 ? Includes diagram2016 · Q139 · MCQ
  36. In the given figure, a diode D is connected to an external resistance R = 100 Ω and an e.m.f. of 3.5 V. If the barrier potential developed across the diode is 0.5 V, the current in the citcuit will be Includes diagram2015 · Q149 · MCQ
  37. Which logic gate is represented by the following combination of logic gates ? Includes diagram2015 · Q132 · MCQ
  38. If in a p-n junction, a square input signal of 10 V is applied, as shown, then the output across RL will be Includes diagram2015 · Q133 · MCQ
  39. The given graph represents V-I characteristic for a semiconductor device. Which of the following statement is correct ? Includes diagram2014 · Q138 · MCQ
  40. The barrier potential of a p-n junction depends on (1) type of semiconductor material (2) amount of doping (3) temperature Which one of the following is correct ?2014 · Q150 · MCQ
  41. The output from a NAND gate is divided into two in parallel and fed to another NAND gate. The resulting gate is a Includes diagram2013 · Q141 · MCQ
  42. In an unbiased p-n junction, holes diffuse from the p-region to n-region because of2013 · Q142 · MCQ
  43. One way in which the operation of a n-p-n transistor differs from that of a p-n-p2013 · Q143 · MCQ
  44. The output (X) of the logic circuit shown ion figure will be Includes diagram2013 · Q140 · MCQ
  45. To get an output Y= 1 in given circuit which of the following input will be correct ? Includes diagram2012 · Q82 · MCQ
  46. Two ideal diodes are connected to a battery as shown in the circuit. The current supplied by the battery is Includes diagram2012 · Q149 · MCQ
  47. C and Si both have same lattice structure; having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because2012 · Q150 · MCQ
  48. The figure shows a logic circuit with two inputs A and B and the output C. The voltage wave forms across A, B and C are as given. The logic circuit gate is Includes diagram2012 · Q151 · MCQ
  49. Pure Si at 500 K has equal number of electron (ne) and hole (nh) concentrations of 1.5 × 1016 m−3. Doping by indium increases nh to 4.5 × 1022 m−3. The doped semiconductor is of2011 · Q82 · MCQ
  50. In the following figure, the diodes which are forward biased, are Includes diagram2011 · Q83 · MCQ
  51. A Zener diode, having breakdown voltage equal to 15 V, is used in a voltage regulator circuit shown in figure. The current through the diode is Includes diagram2011 · Q84 · MCQ
  52. Symbolic representation of four logic gates are shown as Pick out which ones are for AND, NAND and NOT gates, respectively Includes diagram2011 · Q141 · MCQ
  53. If a small amount of antimony is added to germanium crystal2011 · Q142 · MCQ
  54. In forward biasing of the p-n junction2011 · Q143 · MCQ
  55. The following figure shows a logic gate circuit with two inputs A and B and the output Y. The voltage waveforms of A, B and Y are as given. The logic gate is Includes diagram2010 · Q76 · MCQ
  56. To get an output Y = 1 in given circuit which of the following input will be correct ? Includes diagram2010 · Q160 · MCQ
  57. Which one of the following statement is false ?2010 · Q161 · MCQ
  58. The device that can act as a complete electronic circuit is2010 · Q162 · MCQ
  59. Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point ?2010 · Q163 · MCQ
  60. The symbolic representation of four logic gates are given below The logic symbols for OR, NOT and NAND gates are respectively Includes diagram2009 · Q149 · MCQ
  61. A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength2009 · Q150 · MCQ
  62. Sodium has body centred packing. Distance between two nearest atoms is 3.7 A∘​. The lattice parameter is2009 · Q151 · MCQ
  63. A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly2008 · Q143 · MCQ
  64. If the lattice parameter for a crystalline structure is 3.6 A∘​, then the atomic radius in fcc crystal is2008 · Q144 · MCQ
  65. Which one of the following represents forward bias diode ?2007 · Q139 · MCQ
  66. In the following circuit, the output Y for all possible inputs A and B is expressed by the truth table. Includes diagram2007 · Q150 · MCQ
  67. For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct ?2007 · Q151 · MCQ
  68. In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is Includes diagram2007 · Q152 · MCQ
  69. The following figure shows a logic gate circuit with two inputs A and B and the output C. The voltage waveforms of A, B and C are as shown below. The logic circuit gate is Includes diagram2006 · Q150 · MCQ
  70. Which one of the following represents forward bias diode ?2006 · Q174 · MCQ
  71. Choose the only false statement from the following.2005 · Q146 · MCQ
  72. Application of a forward bias to a p-n junction2005 · Q147 · MCQ
  73. Zener diode is used for2005 · Q148 · MCQ
  74. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C, (Eg)si and (Eg)Ge respectively. Which one of the following relationships is…2005 · Q149 · MCQ
  75. Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54 A∘​. The value of lattice constant for this lattice is2005 · Q150 · MCQ
  76. In a p-n junction photo cell, the value of the photo-electromotive force profuced by monochromatic light is proportional to2005 · Q151 · MCQ
  77. In semiconductors at a room temperature2004 · Q136 · MCQ
  78. The peak voltage in the output of a half wave diode rectifier fed with a sinusoidal signal without filter is 10 V. The d.c. component of the output voltage is2004 · Q137 · MCQ
  79. The output of OR gate is 12004 · Q138 · MCQ
  80. Of the diodes shown in the following diagrams, which one is reverse biased ?2004 · Q150 · MCQ
  81. Reverse bias applied to a junction diode2003 · Q150 · MCQ
  82. If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple will be2003 · Q173 · MCQ
  83. Barrier potential of a p-n junction diode does not depened on2003 · Q174 · MCQ
  84. Number of atom per unit cell in B.C.C.2002 · Q148 · MCQ
  85. The given truth table is for which logic gate A&B&Y1&1&00&1&11&0&10&0&1​2002 · Q149 · MCQ
  86. In a p-n junction2002 · Q150 · MCQ
  87. For the given circuit of p-n junction diode which is correct Includes diagram2002 · Q151 · MCQ
  88. The given truth table is for which logic gate A&B&Y1&1&00&1&11&0&10&0&1​2001 · Q147 · MCQ
  89. The current in the circuit will be Includes diagram2001 · Q160 · MCQ
  90. The cations and anions are arranged in alternate form in2000 · Q142 · MCQ
  91. From the following diode circuit, which diode is in forward biased condition2000 · Q143 · MCQ