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Physics - Semiconductors

Practise 122 AP EAMCET previous year questions on Semiconductors, compiled from papers spanning 2001 to 2025. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty AP EAMCET tests.

Semiconductors has been asked in 24 of the 24 years of AP EAMCET papers analysed (2001–2024), with 122 questions in all. 58% of them were easy, 35% moderate and 7% tough. Most of its questions came from 2024, with 18 questions that year. In the last three years (2022–2024) it had 45 questions across 28 papers, about 1.6 per paper.

The chapter's 7 topics are not weighted equally: Junction Transistors (47 questions, 39%), Logic gates (29 questions, 24%), and Diodes (20 questions, 16%) have been asked the most. Junction Transistors has also led over the last five years, with 26 questions. Junction Transistors has produced the most tough questions (5).

  1. 1In a transistor, if the collector current is of emitter current, then the ratio of the base and collector currents is27 May, 2025 (M)Junction Transistors
  2. 2In the given circuit, if and are inputs, then the values of and are respectively27 May, 2025 (M)Logic gates
  3. 3At absolute zero temperature, an intrinsic semiconductor behaves as26 May, 2025 (M)Semiconductors
  4. 4The logic gate equivalent to the combination of logic gates shown in the figure is26 May, 2025 (M)Logic gates
  5. 5In the given options, the diode that is forward biased is26 May, 2025 (E)Diodes
  6. 6In a common emitter transistor amplifier the resistance of collector is . If the current amplification factor is 100 and the base resistance26 May, 2025 (E)Junction Transistors
  7. 7If and Z are the sizes of the emitter, base and collector of a transistor respectively, then24 May, 2025 (M)Junction Transistors
  8. 8The logic gate equivalent to the circuit given in the figure is24 May, 2025 (M)Logic gates
  9. 9The voltage gain and the current amplification factor of a transistor in common emitter configuration are 300 and 60 respectively. If the co23 May, 2025 (M)Junction Transistors
  10. 10The logic gate equivalent to the circuit shown in the figure is23 May, 2025 (M)Logic gates
  11. 11In common emitter amplifier of a transistor, if the ratio of the voltage gain and current amplification factor is 4, then the ratio of the c23 May, 2025 (E)Junction Transistors
  12. 12If three logic gates are connected as shown in the figure, then the correct truth table of the circuit is23 May, 2025 (E)Logic gates
  13. 13A transistor has 3 impurity regions of different doping levels. In the order of increasing doping level, the regions are22 May, 2025 (M)Semiconductors
  14. 14A cc camera is fabricated using a semiconducting material having a band gap of 3 eV. The wavelength of light it can detect is nearly22 May, 2025 (M)Energy Bands in Solids
  15. 15When three NAND logic gates are connected as shown in the figure, then the logic gate equivalent to the circuit is22 May, 2025 (E)Logic gates
  16. 16The device used for voltage regulation is22 May, 2025 (E)Diodes
  17. 17A Zener diode of breakdown voltage 20 V is connected as shown in the given circuit. The current through Zener diode is21 May, 2025 (M)Diodes
  18. 18The voltage gains of two amplifiers connected in series are 8 and 12.5. If the voltage of the input signal is , then the voltage of the outp21 May, 2025 (M)Junction Transistors
  19. 19A transistor works as an amplifier when21 May, 2025 (E)Junction Transistors
  20. 20If five logic gates are connected as shown in the figure, then the values of and are respectively21 May, 2025 (E)Logic gates
  21. 21In the diodes shown in the diagrams, which one is reverse biased?23 May, 2024 (M)Diodes
  22. 22The following configuration of gates is equivalent to23 May, 2024 (M)Logic gates
  23. 23The current gain of a transistor in common emitter configuration is 80 . The resistances in collector and base sides of the circuit are and 22 May, 2024 (M)Junction Transistors
  24. 24Four logic gates are connected as shown in the figure. If the inputs are and , then the values of and respectively are22 May, 2024 (M)Logic gates
  25. 25Truth table for the given circuit is22 May, 2024 (E)Logic gates
  26. 26If and are respectively the resistances of in collector and base sides of the circuit, and is the current amplification factor, then the vol22 May, 2024 (E)Junction Transistors
  27. 27The semiconductor used for fabrication of visible LEDs must at least have a band gap of21 May, 2024 (M)Special purpose diodes
  28. 28In a common emitter amplifier, a.c. current gain is 40 and input resistance is . The load resistance is given as 1 . Then the voltage gain i21 May, 2024 (M)Junction Transistors
  29. 29Pure silicon at 300 K has equal electron and hole concentration of . If the hole concentration increases to , then electron concentration in21 May, 2024 (E)Semiconductors
  30. 30In transistor circuit, the collector current is 10 mA . If of the electrons emitted reach the collector, then the base current is nearly21 May, 2024 (E)Junction Transistors
  31. 31A full wave rectifier circuit is operating from 50 Hz mains, the fundamental frequency in the ripple output will be20 May, 2024 (M)Rectifier
  32. 32A PN junction diode is used as20 May, 2024 (M)Diodes
  33. 33The voltage gain and current gain of a transistor amplifier in common emitter configuration are respectively 150 and 50 . If the resistance 20 May, 2024 (E)Junction Transistors
  34. 34If the energy gap of a substance is 5.4 eV , then the substance is20 May, 2024 (E)Energy Bands in Solids
  35. 35When a signal is applied to the input of a transistor it was found that output signal is phase- shifted by . The transistor configuration is19 May, 2024 (E)Junction Transistors
  36. 36The voltage in the network shown is19 May, 2024 (E)Diodes
  37. 37If and are concentrations of electrons and holes in a semi-conductor, then the intrinsic carrier concentration in thermal equilibrium is18 May, 2024 (M)Semiconductors
  38. 38In the given digital circuit if the inputs are and then the values of and are respectively18 May, 2024 (M)Logic gates
  39. 39In a CE transistor when the base current increases by 60 , change in base-emitter voltage is . Then the input resistance is19 May, 2023 (M)Junction Transistors
  40. 40The photo current in a photo diode depends on19 May, 2023 (M)Special purpose diodes
  41. 41A reverse biased zener diode when operated in the breakdown region works as18 May, 2023 (M)Diodes
  42. 42The current amplification factor and the collector current in a CE transistor circuit are 100 and respectively. Then the base current is18 May, 2023 (M)Junction Transistors
  43. 43In a transistor circuit, if emitter and collector connections are interchanged then18 May, 2023 (E)Junction Transistors
  44. 44In the given circuit, when the values of and Y respectively are17 May, 2023 (M)Logic gates
  45. 45In a transistor amplifier, the voltage gain is17 May, 2023 (M)Junction Transistors
  46. 46The hole and the free electron concentrations in a pure silicon at room temperature are given by each under equilibrium. When it is doped wi17 May, 2023 (E)Semiconductors
  47. 47When and , the output is 0 for17 May, 2023 (E)Logic gates
  48. 48When the temperature of a semiconductor increases then16 May, 2023 (M)Semiconductors
  49. 49For a CE transistor amplifier, the current amplification factor is 59 and the emitter current is . Then the base current is16 May, 2023 (M)Junction Transistors
  50. 50The device that can detect optical signals is16 May, 2023 (E)Special purpose diodes

Frequently Asked Questions

1.How many questions are available for Semiconductors?

This chapter includes 122 questions compiled from AP EAMCET papers spanning 2001 to 2025.

2.Are these questions only from AP EAMCET, or from other exams too?

These are AP EAMCET questions specifically for the Semiconductors chapter. Questions from other exams like JEE Main or NTA Abhyas (JEE Main) are organised separately under their respective exam sections.

3.Is Semiconductors an important chapter for AP EAMCET Physics?

Semiconductors has appeared in 25 of the 25 years of AP EAMCET papers covered here, with 122 questions across 89 papers - about one per paper it appears in.

4.What is the difficulty level of Semiconductors questions in AP EAMCET?

Of the 122 questions analysed for this chapter, 58% are easy, 35% moderate and 7% tough. 2024 had the most, with 18 questions.

5.Which topics in Semiconductors should I focus on?

These topics have carried the most weightage in Semiconductors:

  • Junction Transistors - 47 questions (39%)
  • Logic gates - 29 questions (24%)
  • Diodes - 20 questions (16%)
  • Junction Transistors has produced the most tough questions (5).
6.Is Semiconductors's weightage in AP EAMCET going up or down?

Across all 89 papers analysed, Semiconductors has averaged about 1.4 questions per paper. In the last three years (2022–2024), that average has risen, at about 1.6 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.