Semiconductor Electronics: Materials, Devices and Simple Circuits
137 CBSE Class 12 Physics previous year questions (PYQs) from 5 papers, 2022 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 50 easy · 82 moderate · 5 hard.
- Most-asked subtopics: p-n Junction and the Semiconductor Diode (55), Intrinsic and Extrinsic Semiconductors (44), Application of Junction Diode as a Rectifier (21).
- Updated 13 September 2026.
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#1EasyApplication of Junction Diode as a Rectifier
#2EasyIntrinsic and Extrinsic Semiconductors
#3Moderatep-n Junction and the Semiconductor Diode
#4EasyApplication of Junction Diode as a Rectifier
#5EasyIntrinsic and Extrinsic Semiconductors
#6EasySpecial Purpose p-n Junction Diodes
#7ModerateClassification of Metals, Conductors and Semiconductors
#8ModerateHas imageSpecial Purpose p-n Junction Diodes
#9EasySpecial Purpose p-n Junction Diodes
#10EasyIntrinsic and Extrinsic Semiconductors
#11Easyp-n Junction and the Semiconductor Diode
#12Moderatep-n Junction and the Semiconductor Diode
#13ModerateIntrinsic and Extrinsic Semiconductors
#14EasyClassification of Metals, Conductors and Semiconductors
#15ModerateClassification of Metals, Conductors and Semiconductors
In question number 16 to 18 two statements are given – one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below : (A) Both Assertion (A) and Reason (R) are true and (R) is the correct explanation of (A). (B) Both Assertion (A) and Reason (R) are true and (R) is NOT the correct explanation of (A). (C) Assertion (A) is true and Reason (R) is false. (D) Assertion (A) is false and Reason (R) is also false.#16Moderatep-n Junction and the Semiconductor Diode
#17Moderatep-n Junction and the Semiconductor Diode
#18EasyIntrinsic and Extrinsic Semiconductors
#19Moderatep-n Junction and the Semiconductor Diode
#20Easyp-n Junction and the Semiconductor Diode
#21ModerateApplication of Junction Diode as a Rectifier
#22ModerateClassification of Metals, Conductors and Semiconductors
#23ModerateHas imagep-n Junction and the Semiconductor Diode
#24EasyIntrinsic and Extrinsic Semiconductors
#25Moderatep-n Junction and the Semiconductor Diode
#26Easyp-n Junction and the Semiconductor Diode
#27Moderatep-n Junction and the Semiconductor Diode
#28ModerateIntrinsic and Extrinsic Semiconductors
#29Easyp-n Junction and the Semiconductor Diode
#30ModerateIntrinsic and Extrinsic Semiconductors
#31ModerateApplication of Junction Diode as a Rectifier
#32Easyp-n Junction and the Semiconductor Diode
#33ModerateIntrinsic and Extrinsic Semiconductors
Questions number 13 to 16 are Assertion (A) and Reason (R) type questions. Two statements are given — one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below.#34ModerateIntrinsic and Extrinsic Semiconductors
#35ModerateApplication of Junction Diode as a Rectifier
#36Easyp-n Junction and the Semiconductor Diode
#37Easyp-n Junction and the Semiconductor Diode
#38EasyIntrinsic and Extrinsic Semiconductors
#39Moderatep-n Junction and the Semiconductor Diode
#40Moderatep-n Junction and the Semiconductor Diode
For question numbers 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer from the codes (A), (B), (C) and (D) as given below :#41EasyIntrinsic and Extrinsic Semiconductors
#42EasyIntrinsic and Extrinsic Semiconductors
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.#43ModerateIntrinsic and Extrinsic Semiconductors
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.#44Moderatep-n Junction and the Semiconductor Diode
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.#45Easyp-n Junction and the Semiconductor Diode
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.#46ModerateIntrinsic and Extrinsic Semiconductors
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.#47Easyp-n Junction and the Semiconductor Diode
#48HardHas imagep-n Junction and the Semiconductor Diode
#49Easyp-n Junction and the Semiconductor Diode
#50ModerateIntrinsic and Extrinsic Semiconductors
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