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Phenomenal Classes
เข้าร่วมเมื่อ 22 มิ.ย. 2013
For All Competitive Exam
IIT-JEE/NEET/NDA/CBSE
IIT-JEE/NEET/NDA/CBSE
semiconductor one shot video , chapter 14 class 12, chapter complete in one hour.
1. Metals They possess very low resistivity or high conductivity.
ρ ~ 10-2.10-8 Ωm, σ ~102. 108 Sm-1
2. Semiconductors They have resistivity or conductivity intermediate to metals and insulators.
ρ ~ 10-5. 106 Ωm, σ ~ 10+5 .10-6 Sm-1
Types of Semiconductors Types of semiconductors are given below:
(i) Elements Semiconductors These semiconductors are available in natural form, e.g. silicon and germanium.
(ii) Compound Semiconductors These semiconductors are made by compounding the metals, e.g. CdS, GaAs, CdSe, InP, anthracene, polyaniline, etc.
3. Insulators They have high resistivity or low conductivity.
ρ ~ 1011 . 1019 Ωm, σ ~ 10-11. 10-19 Sm-1
4. Energy Band In a crystal due to interatomic interaction, valence electrons of one atom are shared by more than one atom in the crystal. Now, splitting of energy level takes place. The collection of these closely spaced energy levels are called an energy band.
5. Valence Band Valence band are the energy band which includes the energy levels of the valence electrons.
6. Conduction Band Conduction band is the energy band above the valence band.
7. Energy Band Gap The minimum energy required for shifting electrons from valence band to conduction band is called energy band gap (Eg ).
#semiconductor
#omeshotvideo
#semiconductorphysics
ρ ~ 10-2.10-8 Ωm, σ ~102. 108 Sm-1
2. Semiconductors They have resistivity or conductivity intermediate to metals and insulators.
ρ ~ 10-5. 106 Ωm, σ ~ 10+5 .10-6 Sm-1
Types of Semiconductors Types of semiconductors are given below:
(i) Elements Semiconductors These semiconductors are available in natural form, e.g. silicon and germanium.
(ii) Compound Semiconductors These semiconductors are made by compounding the metals, e.g. CdS, GaAs, CdSe, InP, anthracene, polyaniline, etc.
3. Insulators They have high resistivity or low conductivity.
ρ ~ 1011 . 1019 Ωm, σ ~ 10-11. 10-19 Sm-1
4. Energy Band In a crystal due to interatomic interaction, valence electrons of one atom are shared by more than one atom in the crystal. Now, splitting of energy level takes place. The collection of these closely spaced energy levels are called an energy band.
5. Valence Band Valence band are the energy band which includes the energy levels of the valence electrons.
6. Conduction Band Conduction band is the energy band above the valence band.
7. Energy Band Gap The minimum energy required for shifting electrons from valence band to conduction band is called energy band gap (Eg ).
#semiconductor
#omeshotvideo
#semiconductorphysics
มุมมอง: 171
วีดีโอ
How much should the pressure on a litre of water be changed to compress it by 0.10%?\rcarry one quart
มุมมอง 73หลายเดือนก่อน
How much should the pressure on a litre of water be changed to compress it by 0.10%? carry one quarter of the load. #solid #mechanicalpropertiesofsolids
Determine the volume contraction of a solid copper cube, 10 cm on an edge, when\rsubjected to a hydra
มุมมอง 104หลายเดือนก่อน
Determine the volume contraction of a solid copper cube, 10 cm on an edge, when subjected to a hydraulic pressure of 7.0 × 106 Pa. #ncertsolutions #ncert #mechanicalpropertiesofsolids #solids
Compute the fractional change in volume of a glass slab, when subjected to a hydraulic\rpressure of
มุมมอง 74หลายเดือนก่อน
Compute the fractional change in volume of a glass slab, when subjected to a hydraulic pressure of 10 atm. #ncertsolutions #mechanicalpropertiesofsolids #mechanicalproperties #cbse
What is the density of water at a depth where pressure is 80.0 atm, given that its\rdensity at the s
มุมมอง 183หลายเดือนก่อน
What is the density of water at a depth where pressure is 80.0 atm, given that its density at the surface is 1.03 × 103 kg m-3? #ncert #ncertsolutions #mechanicalpropertiesofsolids #solid
Compute the bulk modulus of water from the following data: Initial volume = 100.0\rlitre, Pressure in
มุมมอง 80หลายเดือนก่อน
Compute the bulk modulus of water from the following data: Initial volume = 100.0 litre, Pressure increase = 100.0 atm (1 atm = 1.013 × 10⁵ Pa), Final volume = 100.5 litre. Compare the bulk modulus of water with that of air (at constant temperature). Explain in simple terms why the ratio is so large. #solid #mechanicalpropertiesofsolids #mechanicalproperties #ncertsolutions
Compound microscope, image at infinity, normal adjustment,
มุมมอง 3662 หลายเดือนก่อน
A compound microscope is a high power (high magnification) microscope that uses a compound lens system. A compound microscope has two lenses: the objective lens Higher magnification is achieved by using two lenses rather than just a single magnifying lens. While the eyepieces and the objective lenses create high magnification. #compoundmicroscope #rayoptics #opticsphysics
Three bulbs, each having a resistance of 180 Ω, are\rconnected in parallel to an ideal battery of emf
มุมมอง 644 หลายเดือนก่อน
Three bulbs, each having a resistance of 180 Ω, are connected in parallel to an ideal battery of emf 60 V. Find the current delivered by the battery when (a) all the bulbs are switched on, (b) two of the bulbs are switched on and (c) only one bulb is switched on. #currentelectricityclass12 #hcverma #iitjee
The resistance of the rheostat shown in figure (32-E5)\ris 30 Ω. Neglecting the meter resistance, fin
มุมมอง 874 หลายเดือนก่อน
The resistance of the rheostat shown in figure (32-E5) is 30 Ω. Neglecting the meter resistance, find the minimum and maximum currents through the ammeter as the rheostat is varied. #currentelectricityclass12 #hcverma #iitjee
If the reading of ammeter A1 in figure (32-E4) is 2.\r4 A,\rwhat will the ammeters A2 and A3 read ?
มุมมอง 644 หลายเดือนก่อน
If the reading of ammeter A1 in figure (32-E4) is 2.4 A, what will the ammeters A2 and A3 read ? Neglect the resistances of the ammeters. #currentelectricityclass12 #hcverma #iitjee
A battery of emf 100 V and a resistor of resistance 10 kΩ\rare joined in series. This system is used
มุมมอง 414 หลายเดือนก่อน
A battery of emf 100 V and a resistor of resistance 10 kΩ are joined in series. This system is used as a source to supply current to an external resistance R. If R is not greater than 100 Ω, the current through it is constant up to two significant digits. Find its value. This is the basic principle of constant-current source. #hcverma #hcvermasolutions #currentelectricityclass12 #electriccurrent
Consider N = n1n2 identical cells, each of emf E and\rinternal resistance r. Suppose n1 cells are joi
มุมมอง 805 หลายเดือนก่อน
Consider N = n1n2 identical cells, each of emf E and internal resistance r. Suppose n1 cells are joined in series to form a line and n2 such lines are connected in parallel. The combination drives a current in an external resistance R. (a) Find the current in the external resistance. (b) Assuming that n1 and n2 can be continuously varied, find the relation between n1, n2, R and r for which the ...
Find the value of i1 /i2 in figure (32-E3) if (a) R = 0.1 Ω,\r(b) R = 1 Ω (c) R = 10 Ω. Note from you
มุมมอง 1736 หลายเดือนก่อน
Find the value of i1 /i2 in figure (32-E3) if (a) R = 0.1 Ω, (b) R = 1 Ω (c) R = 10 Ω. Note from your answers that in order to get more current from a combination of two batteries they should be joined in parallel if the external resistance is small and in series if the external resistance is large as compared to the internal resistances. #currentelectricityclass12 #hcverma #iitjee
The internal resistance of an accumulator battery of emf\r6 V is 10 Ω when it is fully discharged. As
มุมมอง 596 หลายเดือนก่อน
The internal resistance of an accumulator battery of emf\r6 V is 10 Ω when it is fully discharged. As
The potential difference between the terminals of a 6.0 V\rbattery is 7.2 V when it is being charged
มุมมอง 506 หลายเดือนก่อน
The potential difference between the terminals of a 6.0 V\rbattery is 7.2 V when it is being charged
The potential difference between the terminals of a\rbattery of emf 6.0 V and internal resistance 1 Ω
มุมมอง 716 หลายเดือนก่อน
The potential difference between the terminals of a\rbattery of emf 6.0 V and internal resistance 1 Ω
Figure (32-E2) shows an arrangement to measure the emf\rE and internal resistance r of a battery. The
มุมมอง 706 หลายเดือนก่อน
Figure (32-E2) shows an arrangement to measure the emf\rE and internal resistance r of a battery. The
The current in a conductor and the potential difference across its ends are measured by an ammeter a
มุมมอง 526 หลายเดือนก่อน
The current in a conductor and the potential difference across its ends are measured by an ammeter a
The resistances of an iron wire and a copper wire at 200 C are 3.9 Ω and 4.1 Ω respectively. At what
มุมมอง 606 หลายเดือนก่อน
The resistances of an iron wire and a copper wire at 200 C are 3.9 Ω and 4.1 Ω respectively. At what
The resistances of an iron wire and a copper wire at 200 ⁰C are 3.9 Ω and 4.1 Ω respectively. At wha
มุมมอง 486 หลายเดือนก่อน
The resistances of an iron wire and a copper wire at 200 ⁰C are 3.9 Ω and 4.1 Ω respectively. At wha
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of
มุมมอง 596 หลายเดือนก่อน
Calculate the electric field in a copper wire of cross-sectional area 2.0 mm2 carrying a current of
A copper wire of radius 0.1 mm and resistance 1 k Ω is connected across a power supply of 20 V. (a)
มุมมอง 1086 หลายเดือนก่อน
A copper wire of radius 0.1 mm and resistance 1 k Ω is connected across a power supply of 20 V. (a)
Figure (32-E1) shows a conductor of length l having a\rcircular cross section. The radius of cross se
มุมมอง 1626 หลายเดือนก่อน
Figure (32-E1) shows a conductor of length l having a\rcircular cross section. The radius of cross se
What length of a copper wire of cross-sectional area\r0.\r01 mm 2\r will be needed to prepare a resista
มุมมอง 456 หลายเดือนก่อน
What length of a copper wire of cross-sectional area\r0.\r01 mm 2\r will be needed to prepare a resista
Consider a wire of length 4 m and cross-sectional area 1\rmm 2\r carrying a current of 2 A. If each cu
มุมมอง 686 หลายเดือนก่อน
Consider a wire of length 4 m and cross-sectional area 1\rmm 2\r carrying a current of 2 A. If each cu
A uniform wire of resistance 100 Ω is melted and recast\rin a wire of length double that of the origi
มุมมอง 356 หลายเดือนก่อน
A uniform wire of resistance 100 Ω is melted and recast\rin a wire of length double that of the origi
A wire of length 1 m and radius 0.\r1 mm has a resistance\rof 100 Ω.Find the resistivity of the mater
มุมมอง 296 หลายเดือนก่อน
A wire of length 1 m and radius 0.\r1 mm has a resistance\rof 100 Ω.Find the resistivity of the mater
The number density of free electrons in a copper conductor\restimated in Example 3.1 is 8.5 × 1028 m-
มุมมอง 1216 หลายเดือนก่อน
The number density of free electrons in a copper conductor\restimated in Example 3.1 is 8.5 × 1028 m-
A storage battery of emf 8.0 V and internal resistance 0.5 W is being\rcharged by a 120 V dc supply u
มุมมอง 2646 หลายเดือนก่อน
A storage battery of emf 8.0 V and internal resistance 0.5 W is being\rcharged by a 120 V dc supply u
Thank you so much sir 🙏
watched 20 min before the exam but ya got it right
Thank u sir 😊😊😊😊😊
c itta kya hota h bhai 😭
Coefficient of viscosity ko represent krta hai
Sir ya question monthly test ma inp h ky ...
Helpful 👍
Bhaiya why we used alpha as we used it for unaided eye in angular magnification and there is convex lens???
According to definetion we have to take angle with object, we can use any name instead of alpha
Sir uses to samaj aarha h pr production to sahi se samjao
Production samjhna nhi hai syllabus me, hoti kaise hai production ye yaad rakhna hai bus
Legends watching 1 hour before exam 💀
thanks again
thanks
Welcome!
It was really very confusing I was loosing marks again and again while drawing this but this video was very helpful and it really helped to improve my marks thankyou sir
Thank you ji, accha laga sun ke
Thank you sir good job
Thanks sir for saving me from my yesterday's class test thanks alot sir
❤
Can we take object distance as infinity?
Nhi, virtual object lenge
Class.12th hsc k liye applicable hai??
Sir mane dervatio serch kare tha magnetic field at the centre of cc coil to mane ye kare lya sahe ha na sir reply
Sahi hai
Thank you sir ❤
Understood everything
Sirrrrr maine physics kai paper mai relation nikala surface energy = surface tension ×change in area Aur sir nai mujhe danta 😢
Kyu danta, fir kya aana chahiye pucha nhi apne
@phenomenalclasses5574 sirrrrrrrrrr Maine pucha ...mere teacher bolte ki yaha pai area nhi ana chahiya😭 marks kaaat liya paper mai
Fir kya aayega ye to puchte
@@phenomenalclasses5574 🥲
Best explainaton sir❤😊 0:37 0:39 0:41 0:41 0:41 0:41 0:41 0:41 0:41 0:42
Bakiyo ke mukable bahut sahi thaa sir aap sare derivations par video banaya karo bahut aacha samjhya aapne 🔥❤️
Thank you sir❤❤ ..this is the simplest derivation I see
Kis kis ka kal exam hai 😂😂😂
13 February 2025 anyone else
31:36
Sir bohut badhiya samjhata ho
Good explaination sir❤ But hamare school me to consider let etc . Likhate hai . jaise apne karbaya hai ye bhi theek hai na exam ke liye💯
Ha ji bilkul correct hai
Nice sir 👍🏻
But answer is 4x10^-6
It may be misprinted, check calculations
😅
Watching 8hrs before exam
Legends watching onenight before exam like if agree😅😊😂😂
Thank you so much sir ji 😊
❤❤
Very easy aapne bohot achha samjha diya sir thank you
Thank you sir 🙏🏻
fact : most of the students don't even notice that this is an important derivation
Nice explanation😊
Thank u sir !
Nice explanation 🎉🎉
Morning before exam
Legend watching on the day of exam 😅
Neet crack ho gya sir Thank you sooo much ❤❤
Ab hoga academic comeback ❤
Very well explained,,, specially the ray diagram 👍
❤
ƔƐ尺Ϥ ЛɪㄈƐ らɪ尺
2:18 yaha par u kaisay 20 hai ...wo toh v 20 nikla tha na
Stone ke liye ye initial velocity hogi