Reverse bias applied to a junction diode
- Lowers the potential barrier
- raises the potential barrier
- increases the majority carrier current
- increases the minority carrier current
The Correct Option is B
Solution and Explanation
When a diode is reverse-biased, it increases the width of the depletion region, effectively making it more difficult for charge carriers to cross the junction. This results in a higher potential barrier for carriers trying to move from the p-side to the n-side (electrons in the case of an n-p junction).
So, the correct option is (B): raises the potential barrier
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:
P-n Junction
A P-N junction is an interface or a boundary between two semiconductor material types, namely the p-type and the n-type, inside a semiconductor.
Biasing conditions for the p-n Junction Diode:
in p-n junction diode two operating regions are there:
- P-type
- N-type
There are three biasing conditions for p-n junction diode are as follows:
- Zero bias: When there is no external voltage applied to the p-n junction diode.
- Forward bias: P-type is connected to positive terminal of the voltage potential while n-type is connected to the negative terminal.
- Reverse bias: P-type is connected to negative terminal of the voltage potential while n-type is connected to the positive terminal.