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Physics - Semiconductors

Practise 117 TS 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 TS EAMCET tests.

Semiconductors has been asked in 24 of the 24 years of TS EAMCET papers analysed (2001–2024), with 117 questions in all. 61% of them were easy, 34% moderate and 5% tough. Most of its questions came from 2020, with 16 questions that year. In the last three years (2022–2024) it had 33 questions across 17 papers, about 1.9 per paper.

The chapter's 7 topics are not weighted equally: Junction Transistors (31 questions, 26%), Logic gates (31 questions, 26%), and Diodes (21 questions, 18%) have been asked the most. Over the last five years the most frequent topics have been Logic gates (18), Junction Transistors (12), and Semiconductors (11). Junction Transistors has produced the most tough questions (3).

  1. 1At absolute zero temperature, a semiconductor behaves like04 May, 2025 (M)Semiconductors
  2. 2Three logic gates are connected as shown in the figure. If the inputs are and , then the values of and respectively are04 May, 2025 (M)Logic gates
  3. 3The current amplification factor of a transistor in common emitter configuration is 80. If the emitter current is 2.43 mA, then the base cur04 May, 2025 (E)Junction Transistors
  4. 4The negative feedback in an amplifier04 May, 2025 (E)Junction Transistors
  5. 5According to a graph drawn between the input and output voltages of a transistor connected in common emitter configuration, the region in wh03 May, 2025 (M)Junction Transistors
  6. 6If the energy gap of a semiconductor used for the fabrication of an LED is nearly 1.9 eV, then the color of the light emitted by the LED is03 May, 2025 (M)Special purpose diodes
  7. 7The graph between the input voltage and the output voltage of a transistor connected in common emitter configuration is shown in the figure.03 May, 2025 (E)Junction Transistors
  8. 8Which of the following logic gates is a universal gate?03 May, 2025 (E)Logic gates
  9. 9The power gain and voltage gain of a transistor connected in common emitter configuration are 1800 and 60 respectively. If the change in the02 May, 2025 (M)Junction Transistors
  10. 10Six logic gates are connected as shown in the figure. The values of and respectively are02 May, 2025 (M)Logic gates
  11. 11electrons enter the emitter of a junction transistor in a time of . If of the electrons are lost in the base, then the collector current is02 May, 2025 (E)Junction Transistors
  12. 12An electron in n-region of a p-n junction moves towards the junction with a speed of . If the barrier potential of the junction is 0.45 V, t02 May, 2025 (E)Diodes
  13. 13The voltage gain of a transistor in common emitter configuration is 160 . The resistances in base and collector sides of the circuit are 1 k11 May, 2024 (M)Junction Transistors
  14. 14Normally a capacitor is connected across the output terminals of a rectifier to11 May, 2024 (M)Rectifier
  15. 15The voltage gain of a transistor in common emitter configuration is 160 . The resistances in base and collector sides of the circuit are 1 k10 May, 2024 (M)Junction Transistors
  16. 16Normally a capacitor is connected across the output terminals of a rectifier to10 May, 2024 (M)Rectifier
  17. 17In an -type semiconductor, electrons are majority charge carriers and holes are minority charge carriers. The charge of an -type semiconduct10 May, 2024 (E)Semiconductors
  18. 18The region in the output voltage versus input voltage graph where a transistor can be used as an amplifier is10 May, 2024 (E)Junction Transistors
  19. 19The concentration of electrons in an intrinsic semiconductor is . On doping with an impurity the electron concentration increases to . In th09 May, 2024 (M)Semiconductors
  20. 20Three logic gates are connected as shown in the figure. If the inputs are and , then the values of and respectively are09 May, 2024 (M)Logic gates
  21. 21A zener diode of zener voltage 30 V is connected in a circuit as shown in the figure. The maximum current through the zener diode is09 May, 2024 (E)Diodes
  22. 22Two logic gates are connected as shown in the figure. If the inputs are and , then the values of and respectively are09 May, 2024 (E)Logic gates
  23. 23Photodiodes are mostly operated in reverse biased condition because14 May, 2023 (M)Special purpose diodes
  24. 24Which of the following statements is true about LEDs?14 May, 2023 (M)Special purpose diodes
  25. 25When an n-type semiconductor is heated14 May, 2023 (E)Semiconductors
  26. 265 logic gates are connected as shown in the figure. If and are the inputs, is the output then the truth table of the circuit is14 May, 2023 (E)Logic gates
  27. 27The built-in potential of a p-n junction diode is . If the diode is forward biased and the applied voltage is 0.3 , the effective barrier he13 May, 2023 (M)Diodes
  28. 28In the logic circuit given below; if and then the values of and are13 May, 2023 (E)Logic gates
  29. 29The symbol given below represents13 May, 2023 (E)Junction Transistors
  30. 30In a transistor, the base current is and the emitter current is , then the collector current is12 May, 2023 (M)Junction Transistors
  31. 31If the output of a NAND gate is given as input to a NOT gate, the resultant gate is12 May, 2023 (M)Logic gates
  32. 32If the ratio of electron and hole currents in a semiconductor is and the ratio of drift velocities of electrons and holes is , then ratio of12 May, 2023 (E)Semiconductors
  33. 33When a semiconductor is doped with donor impurity12 May, 2023 (E)Semiconductors
  34. 34A p-n junction is fabricated from a semiconductor with band gap of . What approximate wavelength it cannot detect? [use ]20 Jul, 2022 (M)Energy Bands in Solids
  35. 35Identify the logic operation performed by the following circuit.20 Jul, 2022 (M)Logic gates
  36. 36The band gap in a semi-conductor is . The maximum wavelength of electromagnetic radiation which can create a hole-electron pair in this semi20 Jul, 2022 (E)Energy Bands in Solids
  37. 37Identify the logic gate from the following with the same truth table characteristics of the logic circuit below.20 Jul, 2022 (E)Logic gates
  38. 38Current I through a given junction when a voltage is applied across it is given to be where and are constants. If is the dynamic resistance 19 Jul, 2022 (M)Diodes
  39. 39For an n-p-n transistor structure which of the following statements is NOT true?19 Jul, 2022 (M)Junction Transistors
  40. 40The number of silicon atoms per is . This is doped with atoms of Arsenic. The ratio of number of electrons to number of holes after doping i19 Jul, 2022 (E)Semiconductors
  41. 41The output of the following circuit is equivalent to gate.19 Jul, 2022 (E)Logic gates
  42. 42In a p -type semiconductor, which of the following statement is true?18 Jul, 2022 (M)Semiconductors
  43. 43In a NAND Gate, A and B are inputs and Y is the output, then the correct option is18 Jul, 2022 (M)Logic gates
  44. 44The resistivity of a material is found to be 10 8 - m . Then the material would be18 Jul, 2022 (E)Semiconductors
  45. 45The behaviour of the circuit is like gate18 Jul, 2022 (E)Logic gates
  46. 46Which of the following is correct with respect to the following statements? Due to diffusion of electrons from to -side ....... I. electrons06 Aug, 2021 (M)Diodes
  47. 47If in a - junction diode, a square input signal of is applied as shown Then, the output signal across will be06 Aug, 2021 (M)Logic gates
  48. 48What is the maximum wavelength of electromagnetic radiation that create a electron-hole pair in material with band gap ? Planck's constant ,06 Aug, 2021 (E)Energy Bands in Solids
  49. 49The current through the ammeter (neglecting internal resistance) in the following circuit is06 Aug, 2021 (E)Diodes
  50. 50The mass number and the volume of a nucleus is M and V respectively. If the mass number is increased to 2 M then the volume is changed to05 Aug, 2021 (M)Logic gates

Frequently Asked Questions

1.How many questions are available for Semiconductors?

This chapter includes 117 questions compiled from TS EAMCET papers spanning 2001 to 2025.

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

These are TS 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 TS EAMCET Physics?

Semiconductors has appeared in 25 of the 25 years of TS EAMCET papers covered here, with 117 questions across 64 papers - about 2 per paper it appears in.

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

Of the 117 questions analysed for this chapter, 61% are easy, 34% moderate and 5% tough. 2020 had the most, with 16 questions.

5.Which topics in Semiconductors should I focus on?

These topics have carried the most weightage in Semiconductors:

  • Junction Transistors - 31 questions (26%)
  • Logic gates - 31 questions (26%)
  • Diodes - 21 questions (18%)
  • Junction Transistors has produced the most tough questions (3).
6.Is Semiconductors's weightage in TS EAMCET going up or down?

Across all 64 papers analysed, Semiconductors has averaged about 1.8 questions per paper. In the last three years (2022–2024), that average has stayed about the same, at about 1.9 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.