In semiconductors at a room temperature
The valence band is completely filled and the conduction band is partially filled
The valence band is completely filled
The conduction band is completely empty
The valence band is partially empty and the conduction band is partially filled
The Correct Option is D
Solution and Explanation
Top Questions on Semiconductor electronics: materials, devices and simple circuits
Assertion (A): We cannot form a p-n junction diode by taking a slab of a p-type semiconductor and physically joining it to another slab of an n-type semiconductor.
Reason (R): In a p-type semiconductor, \( n_e \gg n_h \) while in an n-type semiconductor \( n_h \gg n_e \).
- CBSE CLASS XII - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
The graph shows the variation of current with voltage for a p-n junction diode. Estimate the dynamic resistance of the diode at \( V = -0.6 \) V.
- CBSE CLASS XII - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- Draw circuit arrangement for studying V-I characteristics of a p-n junction diode.
(b) Show the shape of the characteristics of a diode.
(c) Mention two information that you can get from these characteristics.- CBSE CLASS XII - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- Explain the classification of conductors, insulators and semiconductors on the basis of energy bands.
- UP Board XII - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- Consider a n-type semiconductor in which $ n_e $ and $ n_h $ are the number of electrons and holes, respectively.
- JEE Main - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
Questions Asked in NEET exam
- A microscope has an objective of focal length \(f_o = 2\) cm and an eyepiece of focal length \(f_e = 4\) cm. The tube length of the microscope is \(L = 40\) cm. If the distance of distinct vision of eye is \(D = 25\) cm, the magnification in the microscope is:
- NEET (UG) - 2025
- Optical Instruments
- Which one of the following is an example of ex-situ conservation?
- NEET (UG) - 2025
- Ex-Situ Conservation
- Which one of the following compounds can exist as cis-trans isomers?
- NEET (UG) - 2025
- Organic Chemistry
- Who proposed that the genetic code for amino acids should be made up of three nucleotides?
- NEET (UG) - 2025
- Molecular Biology
- An electron (mass \(9 \times 10^{-31}\) kg and charge \(1.6 \times 10^{-19}\) C) moving with speed \(c/100\) (\(c\) = speed of light) is injected into a magnetic field of magnitude \(9 \times 10^{-4}\) T perpendicular to its direction of motion. We wish to apply a uniform electric field \( \vec{E} \) together with the magnetic field so that the electron does not deflect from its path. (speed of light \(c = 3 \times 10^8\) m/s):
- NEET (UG) - 2025
- Electric Field
Concepts Used:
Semiconductors
Semiconductors are a crystalline solid materials, whose electrical conductivity lies between a conductor and an insulator. Semiconductors are mainly used in the manufacturing of electronic devices like capacitors, transistors, diodes, Integrated circuits, etc.
Properties of Semiconductor:
- Semiconductor acts like an insulator at Zero Kelvin. On increasing the temperature, it works as a conductor.
- Due to their exceptional electrical properties, semiconductors can be modified by doping to make semiconductor devices suitable for energy conversion, switches, and amplifiers.
- Lesser power losses.
Uses of Semiconductor:
- Semiconductors are widely used in manufacturing electronics devices like transistors, diodes, sensors, integrated circuits.
- Semiconductors are widely used in all electronic devices, like mobile phones, digital cameras, communication devices, trains, ATMs, etc.