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NCERT Solutions Class 12 Physics Chapter 12 – Semiconductor Electronic Material Devices and Simple Circuits
14.1
Ans – The correct answer to the above question would be the (c) option. We are conscious that pentavalent impurities, like arsenic, are introduced to n-type semiconductors. When pentavalent atomic substances like Phosphorus are doped under Silicon atoms, an n-type semiconductor gets created.
The procedure for doing so is called doping, while the pentavalent impurity which is introduced is called a dopant. Thus, based on the description previously mentioned, we may conclude that atoms with pentavalent bonds are the dopants, electrons represent the major carriers, and holes are the minority carriers within n-type silicon.
14.2
Ans – The correct answer from the above statement is(d). The vast majority of carriers within p-type silicon comprise holes, whereas the minority carriers constitute electrons. Doping silicon atoms with trivalent elements, like aluminium, results in the formation of a p-type silicon.
14.3
Ans: The correct answer is option (c). The energy band gap is highest in carbon and lowest in germanium.
14.4
Ans – The correct answer to the above question would be the (c) option. This is because hole concentration is higher in the p-region than in the n-region, leading to diffusion. Charge-carrying particles diffuse over a junction between the area of greater quantity to the area of less concentration. As a result, holes propagate throughout the p-type area to the n-type region within an unbiased p-n interface.
14.5
Ans – The right answer to the question above is option (c). When a p-n junction is forward biased, the voltage from external sources reduces the built-in potential barrier. This lets the majority charge carriers, which are electrons from the n-type and holes from the p-type, migrate toward the junction and cross it. This makes current flow. The depletion layer gets thinner, and the potential barrier gets lower.
14.6
Ans – From the above statement, we get to know that the rectifier’s frequency of origin has become 50 Hz. A half-wave rectifier’s frequency of input and return frequency have been determined as being equal.
⇒ Output frequency can be defined as 50Hz
A full-wave rectifier has an output wavelength that is more than double the input wavelength.
⇒ Output frequency can be defined as 2 × 50 = 100Hz
So, the output frequency of a half-wave and full-wave rectifier with an input frequency of 50Hz is 50Hz and 100Hz, respectively.
Class 12 Physics Semiconductor Electronic Material Devices and Simple Circuits Overview
This chapter tells you about the interesting field of electronics, which uses very small parts called semiconductors to power everything from solar panels to smartphones. You will discover how semiconductors function, what kinds of materials are used, and how diodes and transistors are the basic parts of electronic circuits. Our Semiconductor Electronic Material Devices and Simple Circuits NCERT Solutions help students break down each topic into little, easy-to-understand parts.
Many students have trouble with this chapter at first since it goes from classical physics to solid-state electronics all of a sudden. Without the right help, ideas like doping, P-N junctions, and I-V characteristics could seem too vague. In order to clarify the operation of circuit devices such as transistors and diodes, our solutions employ reduced theory, practical analogies, and lucid graphics. Because of this, the change goes more smoothly and is more interesting.
The NCERT syllabus for this chapter in 2025 puts more focus on comprehending things in real life and using simple models. Now, the focus is on how semiconductors work in practical circuits, like amplifiers, rectifiers, and logic gates. Our new Semiconductor Electronic Material Devices and Simple Circuits NCERT Solutions are totally in line with this new focus. This will help you feel more confident while answering questions on both the board and entrance exams.
This chapter shows how basic physics concepts power current technology and how they are related. Our Semiconductor Electronic Material Devices and Simple Circuits NCERT Solutions give you the clarity, accuracy, and confidence you need to learn about electronic devices from the bottom up, whether you’re getting ready for the CBSE boards, NEET, or JEE.
FAQs – Semiconductor Electronic Material Devices and Simple Circuits Class 12 Chapter – 14 NCERT
Because they involve abstract atomic-level behaviour. Our NCERT solutions simplify these concepts using band diagrams and relatable analogies.
We explain it like this: intrinsic ones are pure, while extrinsic are doped with elements to improve conductivity. Our charts make this crystal clear.
Through labelled diagrams and truth tables. Our solutions provide step-by-step illustrations and shortcuts for quick learning.
Don’t worry! We teach it visually and practically. With real-life examples and device-based learning, electronics won’t feel unfamiliar anymore.