✓ Board-verified
Physics · 2023 · 5 marks
Semiconductor Electronics: Materials, Devices and Simple CircuitsExtrinsic Semiconductor5 marksUnderstandlong answer
CBSE 2023 · Region 4 · Set 1 · Q33
(a) (i) A germanium crystal is doped with antimony. With the help of energy-band diagram, explain how the conductivity of the doped crystal is…
(i)
A germanium crystal is doped with antimony. With the help of energy-band diagram, explain how the conductivity of the doped crystal is affected.
(ii)
Briefly explain the two processes involved in the formation of a p-n junction.
(iii)
What will the effect of ($\displaystyle 1$) forward biasing, and ($\displaystyle 2$) reverse biasing be on the width of depletion layer in a p-n junction diode?
(i)
With the help of a circuit diagram, briefly explain the working of a full-wave rectifier using $\displaystyle \mathrm{p}-\mathrm{n}$ junction diodes.
(ii)
Draw V - I characteristics of a p-n junction diode. Explain how these characteristics make a diode suitable for rectification.
(iii)
Carbon and silicon have the same lattice structure. Then why is carbon an insulator but silicon a semiconductor?
Marking-scheme solution
(a)(i)
With proper level of doping, the number of conduction electrons can be made much larger than the number of holes. Due to this conductivity of the doped crystal increases.
All Semiconductor Electronics: Materials, Devices and Simple Circuits questions2023 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 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.