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Question 11 - M4 (16 marks) Consider the semiconductor materials Silicon (Si) and Germanium (Ge). Intrinsic Si has a ba...
Question 13 (7 marks) 13.1) (2 marks) Intrinsic semiconductor Germanium (Ge) has a bandgap of 0.67eV How do you expect...
Question 13 (7 marks) 13.1) (2 marks) Intrinsic semiconductor Germanium (Ge) has a bandgap of 0.67eV How do you expect the electrical resistivity of Intrinsic Ge to change as you increase its temperature from room temperature to one hundred degrees? 13.2) (1 mark) Pure Si is also an intrinsic semiconductor, but with a band gap of 1.11eV. How do you expect the electrical resistivity of Intrinsic Si to compare with that of Intrinsic Ge? 13.3) (2 marks) If we add...
QUESTION 43 (10 Marks) a) Calculate the conductivity of an intrinsic silicon (SI) semiconductor at 27°C...
QUESTION 43 (10 Marks) a) Calculate the conductivity of an intrinsic silicon (SI) semiconductor at 27°C if the hole mobility is 460 cm V's and the electron mobility is 1350 cm? Vis! Assume an intrinsic carrier density of 1.45 x 10 carriers/cm' and an electron charge of -0.16 x 10-4C (3 marks) b) Using Figure 8, calculate the conductivity of the Si intrinsic semiconductor if the temperature is increased to 150°C, assuming the same electron and hole mobilities (2 marks)...
Q5: a) On the axis below draw the plot for an intrinsic silicon and m-aype c...
Q5: a) On the axis below draw the plot for an intrinsic silicon and m-aype c Your x- axis should be temperature in Kelvin and y-axis the charge carrier S+2 +2+1-10 Marks Your x-axis should start from 0 K In your plot, clearly label the three different zones of interest along with their charge carrier concentration (m) charge carrier b) Intrinsic semiconductor Germanium (Ge) has a bandgap of 0.67eV as opposed to intrinsic Silicon which has a bandgap of 1.11...
Taking pure silicon (Si) as an example, explain what is meant by the terms electron-hole generation...
Taking pure silicon (Si) as an example, explain what is meant by the terms electron-hole generation and recombination, how they affect the electrical conductivity, and define what is meant by the "intrinsic carrier density", n. [5 marks] Q3. a) b) With the aid of both lattice and energy band diagrams, explain how n-type doping of Si is achieved and state two types of suitable dopant atoms. [7 marks] c) An n-type region on a Si wafer has a donor concentration...
ans, 9.1 L = 0.848 m please answer in details i need help Question 9 - M2 (11 marks) An incandescent light bu...
ans,
9.1
L = 0.848 m
please answer in details i need help
Question 9 - M2 (11 marks) An incandescent light bulb is basically a resistor in an electrical circuit. The Tungsten wire filament acts as the resistor. Consider you connect an 60 Watt bulb to a 240V mains household electricity supply. 9.1) (4 marks) If the Tungsten filament is constrained to be of 15um diameter, how long does the Tungsten wire need to be to make the filament?...
EENG 245 Physical electronics HW 1 1) The NaCl crystal is cubic, and can be described...
EENG 245 Physical electronics HW 1 1) The NaCl crystal is cubic, and can be described as follows. Na atoms sit at the corners and faces of a cube, and Cl atoms sit in between two Na atoms. This means that a Clatom is found half-way along each of the cube edges, and there is a Cl in the center of the cube. (We could also have described the lattice by interchanging Na and Cl in the description above.) Another...
Question 13 (7 marks) 13.1) (2 marks) Intrinsic semiconductor Germanium (Ge) has a bandgap of 0.67eV How do you expect the electrical resistivity of Intrinsic Ge to change as you increase its temperature from room temperature to one hundred degrees? 13.2) (1 mark) Pure Si is also an intrinsic semiconductor, but with a band gap of 1.11eV. How do you expect the electrical resistivity of Intrinsic Si to compare with that of Intrinsic Ge? 13.3) (2 marks) If we add...
QUESTION 43 (10 Marks) a) Calculate the conductivity of an intrinsic silicon (SI) semiconductor at 27°C if the hole mobility is 460 cm V's and the electron mobility is 1350 cm? Vis! Assume an intrinsic carrier density of 1.45 x 10 carriers/cm' and an electron charge of -0.16 x 10-4C (3 marks) b) Using Figure 8, calculate the conductivity of the Si intrinsic semiconductor if the temperature is increased to 150°C, assuming the same electron and hole mobilities (2 marks)...
Q5: a) On the axis below draw the plot for an intrinsic silicon and m-aype c Your x- axis should be temperature in Kelvin and y-axis the charge carrier S+2 +2+1-10 Marks Your x-axis should start from 0 K In your plot, clearly label the three different zones of interest along with their charge carrier concentration (m) charge carrier b) Intrinsic semiconductor Germanium (Ge) has a bandgap of 0.67eV as opposed to intrinsic Silicon which has a bandgap of 1.11...
Taking pure silicon (Si) as an example, explain what is meant by the terms electron-hole generation and recombination, how they affect the electrical conductivity, and define what is meant by the "intrinsic carrier density", n. [5 marks] Q3. a) b) With the aid of both lattice and energy band diagrams, explain how n-type doping of Si is achieved and state two types of suitable dopant atoms. [7 marks] c) An n-type region on a Si wafer has a donor concentration...
ans,
9.1
L = 0.848 m
please answer in details i need help
Question 9 - M2 (11 marks) An incandescent light bulb is basically a resistor in an electrical circuit. The Tungsten wire filament acts as the resistor. Consider you connect an 60 Watt bulb to a 240V mains household electricity supply. 9.1) (4 marks) If the Tungsten filament is constrained to be of 15um diameter, how long does the Tungsten wire need to be to make the filament?...
EENG 245 Physical electronics HW 1 1) The NaCl crystal is cubic, and can be described as follows. Na atoms sit at the corners and faces of a cube, and Cl atoms sit in between two Na atoms. This means that a Clatom is found half-way along each of the cube edges, and there is a Cl in the center of the cube. (We could also have described the lattice by interchanging Na and Cl in the description above.) Another...
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