A semiconductor is a substance that has specific electrical properties that enable it to serve as a foundation for computers and other electronic devices. It is typically a solid chemical element or compound that conducts electricity under certain conditions but not others.
What is a semiconductor class 12 Physics?
Semiconductors are the materials which have a conductivity between conductors (generally metals) and non-conductors or insulators (such as ceramics). Semiconductors can be compounds such as gallium arsenide or pure elements, such as germanium or silicon.
What is Physics of semiconductor?
The Physics of a Semiconductor They have a moderate range of electrical conductivity. The examples of such materials are germanium, silicon, carbon etc. As the conductivity of those materials lies between good conductors and insulators, and these materials are called semiconductors.
Is semiconductor Chapter easy?
Semi conductors and communication can be treated as moderately difficult. You need to keep in kind certain things and keep your concepts clear. Also along with understanding the topic you need to mug up few things. It is an important chapter for jee mains and students must try to study it nicely.
Is semiconductor Class 12 difficult?
No its not at all tough it just consist of the topics that we had covered in jee itsepf and during boards preparation but here its just in vast format consisting bjt , hall effects , MOSFET, all applications regarding semiconductors .
What are the 2 types of semiconductors?
Semiconductors are divided into two categories: Intrinsic Semiconductor. Extrinsic Semiconductor.
What are the 3 properties of semiconductors?
- Property 1:The resistivity of a semiconductor is less than an insulator but higher than a conductor.
- Property 2: Semiconductors show a negative temperature coefficient of resistance.
- Property 3: At zero kelvin, semiconductors behave as insulators.
What is called semiconductor?
What is a semiconductor ? Semiconductors. Semiconductors are materials which have a conductivity between conductors (generally metals) and nonconductors or insulators (such as most ceramics). Semiconductors can be pure elements, such as silicon or germanium, or compounds such as gallium arsenide or cadmium selenide.
What is semiconductor and its properties?
Semiconductors possess specific electrical properties. A substance that conducts electricity is called a conductor, and a substance that does not conduct electricity is called an insulator. Semiconductors are substances with properties somewhere between them. Electrical properties can be indicated by resistivity.
Why is PN junction used?
P-N junction diode can be used as a photodiode as the diode is sensitive to the light when the configuration of the diode is reverse-biased. It can be used as a solar cell. When the diode is forward-biased, it can be used in LED lighting applications.
What is pn junction diode?
A p-n junction diode is a basic semiconductor device that controls the flow of electric current in a circuit. It has a positive (p) side and a negative (n) side created by adding impurities to each side of a silicon semiconductor. The symbol for a p-n junction diode is a triangle pointing to a line.
Is semiconductor solid or liquid?
The most common semiconducting materials are crystalline solids, but amorphous and liquid semiconductors are also known. These include hydrogenated amorphous silicon and mixtures of arsenic, selenium, and tellurium in a variety of proportions.
Is PCM easy or hard?
PCM is considered a tough choice because physics and math increase the workload.
Why is 12th physics so hard?
Most of the students find the Class 12 Physics subject difficult. This is also due to the vast syllabus and derivations that are there in both parts of the NCERT class 12 Physics book.
Is semiconductor in JEE Main?
Ans. Every year 1-2 questions come on the topic of Semiconductors in JEE Main. This topic has a weightage of 3.3% of JEE Main Physics Syllabus.
What is the use of semiconductor?
Semiconductors are an essential component of electronic devices, enabling advances in communications, computing, healthcare, military systems, transportation, clean energy, and countless other applications.
What is the unit of energy gap?
The energy required for electrons and holes to transition from the valence band to the conduction band is called a band gap. Si (Silicon) has a band gap of 1.12 eV (electron volt).
What are the main semiconductors?
Common elemental semiconductors are silicon and germanium. Silicon is well-known of these. Silicon forms most of ICs. Common semiconductor compounds are such as gallium arsenide or indium antimonide.
What are basic semiconductor devices?
- DIAC.
- Diode (rectifier diode)
- Gunn diode.
- IMPATT diode.
- Laser diode.
- Light-emitting diode (LED)
- Photocell.
- Phototransistor.
Why silicon is used in semiconductor?
Silicon, a very common element, is used as the raw material of semiconductors because of its stable structure. Purification of Silicon consumes large amounts of power.
What are p type materials?
A p-type semiconductor is an intrinsic semiconductor doped with boron (B) or indium (In). Silicon of Group IV has four valence electrons and boron of Group III has three valence electrons.
How many types are semiconductors?
The semiconductor can be classified into two types, intrinsic and extrinsic semiconductors.
What are the advantages of semiconductor?
Semiconductors, unlike vacuum tubes, are shock-proof. Furthermore, they are smaller in size, take up less space, and use less power. Semiconductors are extremely sensitive to temperature and radiation when compared to vacuum tubes. Semiconductors are less expensive than vacuum diodes and have a much longer shelf life.
What are the 2 best examples of semiconductor materials?
The most used semiconductor materials are silicon, germanium, and gallium arsenide. Of the three, germanium was one of the earliest semiconductor materials used. Germanium has four valence electrons, which are electrons located on the outer shell of the atom.
What is another name for a semiconductor?
chip, transistor, semis.