Q: 03. How can we determine of the band-gap of gemanium from electrical measurements?
A: Band gap of semiconductor like germanium can be determined by the study of the Variation of its…
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A: Unit of energy is converted as follows,
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Q: In a semiconductor, the bonding molecular orbitals that contain electrons are referred to as the…
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Q: The electronic structure of a doped semiconductor isshown here. (a) Which band, A or B, is the…
A: Hey, since you are posted a question with multiple sub-parts, we will answer first three sub-parts.…
Q: Two solids are shown below. One is a semiconductor andone is an insulator. Which one is which?…
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Q: On
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Q: Blue LEDS are made from In,Ga1-N semiconductors with a band gap in eV given by E, = 3.40 – 3.75x +…
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Q: Diffusion does not have an effect on______. a) Doping in semiconductors b) Production of alloys c)…
A: Diffusion doesn't not have an effect on heat treatment of metals . In production of alloy the metal…
Q: Indicate whether each statement is true or false:(a) The band gap of a semiconductor decreases as…
A: FALSE, As the particle size decreases, band gap of semiconductor increases.
Q: Explain what happens when a pure semiconductor made up of Silicon is doped with an Indium atom…
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Q: What type of bonding is predominant in ceramics?
A: Solution- in the ceramics two type of bonding found (1)ionic and (2) covalent. An ionic bond…
Q: ite form of iron has fcc crystal lattice structure,whereas its alpha form has bcc crystal lattice…
A: For a Face-Centred Cubic lattice: 4r=2a where r is the radius of the atom and a is the edge length.…
Q: Use the Born-Mayer equation to estimate the latticeenthalpy of calcium sulfide. CaS. The crystal…
A: The Born-Mayer equation is that equation whose function is to calculate the lattice energy of an…
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A: Insulators have large energy gapSemi conductors have somewhat less energy gap than insulators…
Q: Determine the lattice constant, a (in nm), of a metal conforming to the FCC structure having an…
A: For a FCC lattice the relation between lattice constant (a) and radius of atom (r) is 4r=2a Here…
Q: Which of these statements is false?(a) As you go down column 4A in the periodic table, the…
A: As we go down the group 4A or group 14 in periodic table, the atomic size increases and the valence…
Q: What is semi-conductor?
A: Conductors are those substances which allow the flow of heat and electricity through them while…
Q: When you shine light of band gap energy or higher on asemiconductor and promote electrons from the…
A: The conductivity of semiconductor is possible due to the transfer of an electron from the valance…
Q: Define a semiconductor? Describe the two main types of semiconductorswhen it is doped with(a) group…
A: Semiconductors can be defined as the solids having conductivity in between those of conductors and…
Q: Account for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity…
A: Density of the substance remains constant at a constant temperature. It is equal to the ratio of…
Q: In how many allotropic forms does arsenic exists?
A: Allotropes of an element are forms of the same element with different physical and chemical…
Q: arsenic is a suitable element for doping a pure semiconductor and convert it into an accept True or…
A: Doping is the process of adding impurities to intrinsic semiconductors to alter their properties.…
Q: The electronic structure of a doped semiconductor isshown here. (a) Which band, A or B, is the…
A: The bands closest to the fermi level are valence band and conduction band. The electrical…
Q: What do Doped semiconductors contain?
A: Semiconductors has a conductivity power in between insulators and conductors. The conductivity power…
Q: Two solids are shown below. One is a semiconductor andone is an insulator. Which one is which?…
A: Since in insulators, the gap between the conduction band and valence band is very high. Hence there…
Q: The unit cell of a compound containing Co and O has a unitcell shown below. The Co atoms are on the…
A: Since both the O atoms are completely inside the unit cell. Hence the contribution of both O to the…
Q: For each of the following pairs of semiconductors, pick which one would have the larger bandgap.…
A: SEMICONDUCTORS: Certain materials which has a conductivity which lies between nonconductors and…
Q: Which of the following doped semiconductors will be p-type and which will be n-type (i)Arsenic in…
A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…
Q: For each of the following pairs of semiconductors, whichone will have the larger band gap: (a) InP…
A: Since the band gap is directly proportional to the electronegativity difference of the atoms Hence…
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A: Wavelength can be calculated using the given equation: E = hcλ
Q: Compare the hybridization of Si atoms in Si(s) with thatof C atoms in graphite (see Fig. 21.26). If…
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Q: The semiconductor CdSe has a band gap of 1.74 eV. Whatwavelength of light would be emitted from an…
A: The semiconductor CdSe has a band gap of 1.74 eV. The wavelength of light that would be emitted from…
Q: Which allotropic form of carbon are conductor and which are non conductor's and why?
A: Allotropy is defined as the property of some chemical elements to exist in two or more different…
Q: Sketch [0110] and [2243] in an HCP unit cell.
A: Solution: We will draw a hexagonal unit cell with ruled co-ordinate system as follows: Point O is…
Q: Give answers of the following. a. Which allotropic forms of carbon are conductor and which are…
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Q: Explain how doping can increase the conductivity of a semiconductor.
A: Conductivity is due to the mobility of electrons; therefore, conductivity can be increased by…
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A: In semiconductors and insulators, electrons are confined to a number of bands of energy, and…
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A: Example of non-silicate mineral are pyrite(FeS2), calcite(carbonate), hematite (oxide) and halite…
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- Account for the relative band gap energies of semiconductors interms of periodic trends?122 CHAPTER 5ID 15. Which of the following best describes the particle-level bonding in a crystal of KBr? iupil doiw (A) alternating positive and negative metal ions in a crystal lattice framework. (B) positive and negative ions in fixed position in a crystal lattice framework. (C) mobile valence electrons shared between positive metal ions. (D) metallic and nonmetallic atoms covalently bonded in a 3-dimenional framework. () HO (C) CC (D) CH'OE Questions 16-17 use the following information. 6801 9010 oloegsini doidW8 H H H---H H H Ethane wolod a (B) но-с-Сн, — СH, — СH, — СH, ннн нннн H-C-C- C-C-C-C-C-H || | | I|| Η Η Η Η | H. нн Heptane Pentanoic Acid 10 Name Chemical Formula Molar Mass (g/mole) Boiling Point (°C) Ethane 30.07 -88.5 Heptane 16 100.20 98.1-98.7 Pentanoic Acid 102.13 186-187 16. Heptane and pentanoic acid have very similar molar masses, but pentanoic acid has a significantly higher boiling point. Which of the following statements best helps explain this observation? (A)…Sketch the band structure of a Li AND a Si crystal. (ii) How would you expect the electrical conductivity in Li AND Si crystals to vary with temperature? (iii) Account for the fact that the conductivity of Si is enhanced by the addition of small amounts of B.
- calculate the linear electron density of gallium arsenide in with is 10 nm the sub band values of the GeAr are nx =2,ny =2Explain the following trend in the lattice energy of oxides (in kJ.mol²) assuming all have the same structure: MnO (3810), FeO (3921), CoO (3988), NiO (4071).(a) Answer parts i), i),ii) and iv) side by side so that the relative scales are obvious, include electron occupancy. (i) Draw the band structure of potassium (ii) Draw the band structure of silicon (iii) Draw the band structure of carbon (iv) Draw the band structure of germanium (b) Based on your diagrams, state the order of electrically conductivity for the four elements at 300 K, from the smallest to the highest - explain your choice. Magnesium has an electron configuration of 1s? 2s? 2p° 3s?. Using band diagrams explain why this element is considered an (c) electrical conductor. (d) improve its ability to conduct electricity. What type of extrinsic semiconductor results and explain how the addition of arsenic increases conductivity (use diagrams if necessary)? A small amount of arsenic is added to a sample of silicon to (i) Gallium phosphide (GaP) has a band gap of 2.26 eV. Calculate the wavelength of light emitted in nm (1 eV = 1.6 x 1019 J). (e) (ii) It is required for a…