NCERT Class 12 Physics Chapter 14 Semiconductor Electronics Materials Devices and Simple Circuits Solutions: With 2025 board exams approaching, students need to review their syllabus and begin practising questions and sample papers. This article compiles comprehensive solutions for NCERT Class 12 Physics Chapter 14 on Semiconductor Electronics Materials Devices and Simple Circuits Solutions, providing a one-stop resource. These solutions cover both theoretical and numerical problems, helping students solidify their understanding of the chapter’s key concepts. Complete answers to all exercises in Chapter 14 are included, offering students thorough guidance in mastering and practising the content effectively. The solutions align with the latest CBSE marking scheme to aid students in preparing accurate responses.
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NCERT Solutions For Class 12 Physics Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits
1. In an n-type silicon, which of the following statements is true:
(a) Electrons are the majority carriers and trivalent atoms are the dopants.
(b) Electrons are minority carriers and pentavalent atoms are the dopants.
(c) Holes are minority carriers and pentavalent atoms are the dopants.
(d) Holes are the majority carriers and trivalent atoms are the dopants.
Answer- (c) Holes are minority carriers and pentavalent atoms are the dopants.
2. Which of the statements given in Exercise 14.1 is true for p-type Semiconductors?
Answer- (d) Holes are the majority carriers and trivalent atoms are the dopants.
3. In an unbiased p-n junction, holes diffuse from the p-region to the n-region because
(a) free electrons in the n-region attract them.
(b) they move across the junction by the potential difference.
(c) hole concentration in the p-region is higher as compared to the n-region.
(d) All the above.
Answer- (c) hole concentration in the p-region is higher as compared to the n-region.
4. When a forward bias is applied to a p-n junction, it
(a) raises the potential barrier.
(b) reduces the majority carrier current to zero.
(c) lowers the potential barrier.
(d) None of the above.
Answer- (c) lowers the potential barrier.
5. In half-wave rectification, what is the output frequency if the input frequency is 50 Hz? What is the output frequency of a full-wave rectifier for the same input frequency?
To get the rest of the answers to the questions and other questions as well, students can download the PDF for free that we are providing below:
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