✓ Board-verified
Physics · 2026 · 2 marks
Semiconductor Electronics: Materials, Devices and Simple CircuitsIntrinsic Semiconductor2 marksRemembervery short answer
CBSE 2026 · Region 2 · Set 1 · Q17
Write two points of difference between intrinsic and extrinsic semiconductors.
Write two points of difference between intrinsic and extrinsic semiconductors.
Marking-scheme solution
| Intrinsic semiconductors | Extrinsic semiconductors |
| 1. $\displaystyle n_{e}=n_{h}$ | 1. $\displaystyle n_{e} \neq n_{h}$ (Alternatively $\displaystyle n_{e} \gg n_{h}$ or $\displaystyle n_{e} \ll n_{h}$) |
| 2. Low conductivity | 2. high conductivity |
| 3. Semiconductor without any impurity atoms added / Pure semiconductor. | 3. Semiconductor with doping / Impure Semiconductor. |
| 4. Its conductivity depends only on temperature | 4. Its conductivity depends on temperature and concentration of dopants |
| 5. They are naturally occurring semiconductors | 5. They are manufactured semiconductors. |
All Semiconductor Electronics: Materials, Devices and Simple Circuits questions2026 question paperNCERT solutions: Semiconductor Electronics: Materials, Devices and Simple CircuitsPractice Semiconductor Electronics: Materials, Devices and Simple Circuits →
More from Semiconductor Electronics: Materials, Devices and Simple Circuits
- With the help of a circuit diagram, explain the working of a p-n junction diode as a full-wave rectifier. Also draw its input and output waveforms.2022 · asked 2×
- State the working principle of an LED. Write any two important advantages and two disadvantages of LED.2022
- What are majority and minority charge carriers in an extrinsic semiconductor? A p-n junction is forward biased. Describe the movement of the charge…2025
- Draw the circuit diagrams for obtaining the V-I characteristics of a p-n junction diode. Explain briefly the salient features of the V - I…2024
- A pure Si crystal having 5 × 10^28 atoms m^-3 is dopped with 1 ppm concentration of antimony. If the concentration of holes in the doped crystal is…2024
- With the help of circuit diagrams, briefly explain the forward biasing and the reverse biasing of a p-n junction diode.2026
- In an intrinsic semiconductor, carrier's concentration is 5 × 10^8 m^-3. On doping with impurity atoms, the hole concentration becomes 8 × 10^12…2025
- Assertion: A hole is an apparent free particle with effective positive electronic charge. Reason ( R ): A hole is not necessarily a vacancy left…2025
CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.