Question:
The energy band gap of semiconducting material to produce violet (wavelength = $4000 \mathring{A}$ ) LED is ______$eV$ (Round off to the nearest integer)
The energy band gap of semiconducting material to produce violet (wavelength = $4000 \mathring{A}$ ) LED is ______$eV$ (Round off to the nearest integer)
Updated On: Mar 19, 2025
Hide Solution
Verified By Collegedunia
Correct Answer: 3
Solution and Explanation
The correct answer is 3.
Was this answer helpful?
0
0
Top Questions on 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
- The range of electrical conductivity \( \sigma \) and resistivity \( \rho \) for metals, among the following, is:
- KCET - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- The reverse saturation current (I0) of a silicon diode at 27°C is \( 10^{-6} \) A. What will be the approximate value of I0 at 67°C? (Assume \( I_0 \) doubles for every 10°C rise in temperature)
- MHT CET - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- In a silicon semiconductor at room temperature, the intrinsic carrier concentration is \( 1.5 \times 10^{16} \, \text{m}^{-3} \). Calculate the energy band gap of the silicon if the intrinsic carrier concentration is given by: \[ n_i = \sqrt{N_c N_v} e^{-E_g / 2kT} \] Where: - \( N_c = 2.8 \times 10^{25} \, \text{m}^{-3} \) is the effective density of states in the conduction band, - \( N_v = 1.04 \times 10^{25} \, \text{m}^{-3} \) is the effective density of states in the valence band, - \( k = 1.38 \times 10^{-23} \, \text{J/K} \) is the Boltzmann constant, - \( T = 300 \, \text{K} \) is the temperature.
- MHT CET - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
- In a p-n junction diode, what happens to the width of the depletion region when the forward bias is increased?
- MHT CET - 2025
- Physics
- Semiconductor electronics: materials, devices and simple circuits
View More Questions
Questions Asked in JEE Main exam
- The expression given below shows the variation of velocity \( v \) with time \( t \): \[ v = At^2 + \frac{Bt}{C + t}. \] The dimension of \( ABC \) is:
- JEE Main - 2025
- Thermodynamics terms
- The greatest value of \( n \), where \( n \in \mathbb{N} \), such that \( 3^n \) divides \( 50! \) is:
- JEE Main - 2025
- Number Systems
Match List-I with List-II.
Choose the correct answer from the options given below :- JEE Main - 2025
- Thermodynamics
- Let \( y = f(x) \) be the solution of the differential equation\[\frac{dy}{dx} + \frac{xy}{x^2 - 1} = \frac{x^6 + 4x}{\sqrt{1 - x^2}}, \quad -1 < x < 1\] such that \( f(0) = 0 \). If \[6 \int_{-1/2}^{1/2} f(x)dx = 2\pi - \alpha\] then \( \alpha^2 \) is equal to __________.
- JEE Main - 2025
- Differential equations
- Marks obtained by all the students of class 12 are presented in a frequency distribution with classes of equal width. Let the median of this grouped data be 14 with median class interval 12-18 and median class frequency 12. If the number of students whose marks are less than 12 is 18, then the total number of students is:
- JEE Main - 2025
- Statistics
View More Questions
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.