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When a sample of germanium and silicon having same impurity density are kept at room temperature then resistivity of both?
The resistivity of germanium will decrease with increasing temperature due to a positive temperature coefficient of resistivity, while the resistivity of silicon will increase with increasing temperature due to a negative temperature coefficient of resistivity. At room temperature, silicon will have a higher resistivity compared to germanium.
What is the resistivity of germanium?
This varies inversely with the amount of impurities.
Does high resistivity have a higher number or lower number?
High resistivity corresponds to a higher numerical value. In the context of materials, resistivity is a measure of how strongly a material opposes the flow of electric current; materials with high resistivity, like rubber or glass, have larger resistivity values compared to conductive materials like copper or aluminum, which have low resistivity values.
When a piece of copper and another of germanium are cooled from room temperature to 800 K then the resistance?
The resistance of the copper piece will increase, while the resistance of the germanium piece will decrease as they are both cooled from room temperature to 800 K. This is because the resistivity of metals like copper generally increases with decreasing temperature, while for semiconductors like germanium, the resistivity decreases with decreasing temperature.
Is glass a conductor or nonconductor?
Glass is a nonconductor, also known as an insulator. It does not allow the flow of electricity through it because of its high resistivity. This property makes glass useful for insulating materials in electrical applications.
What are semi conducting substances?
Those which have resistivity in between conductors and insulators are known as semi conductors. Germanium and Silicon are very good examples of semiconducting materials whose resistivity of the order of 10 -2 to 10 4 ohm meter.
Why depletion region is small in germanium compared to silicon?
The depletion region is smaller in germanium compared to silicon because germanium has a lower bandgap energy, meaning that charge carriers can easily cross the depletion region and recombine on the other side. This results in a smaller built-in potential and a smaller depletion region in germanium.
Why is silicon more widely used than germanium?
because it can withstand more temperature compared to germanium and relatively cheaper and it is available abundantly in sand where as germanium is rare so Si has advantages than Ge though its conductivity is more compared to Si
Can you explain why silicon and germanium are used in the manufacturing of semiconductors?
silicon is less sensitive towards temperature.It costs low compared to germanium,
What is electrical resistivity of molybdenum?
The electrical resistivity of molybdenum is approximately 5.50 x 10^-8 ohm-meters at room temperature. It is considered a good conductor of electricity due to its relatively low resistivity compared to insulating materials.
Why germanium has larger leakage current than silicon?
Germanium has a smaller bandgap compared to silicon, leading to higher intrinsic carrier concentration and hence greater leakage current. Additionally, germanium has a higher intrinsic carrier mobility, which can further contribute to increased leakage current compared to silicon.
Why is silicon is preferred is germanium?
Silicon is actually preferred to germanium within the manufacture of semiconductor devices due to the following reasons:Silicon is cheap and abundantIn silicon, leakage current is less affected by temperature as compared to germanium.The leakage current in silicon is very very small as compared to germanium.The working temperature of silicon is more than that of germanium. The working junction temperature of silicon can go as high as 150C whereas the working junction temperature of germanium can only go as high as 60CSilicon dioxide is a stable insoluble solid that can be used both to electrically insulate circuitry and to passivate junctions preventing contamination (allowing use of inexpensive plastic packages), germanium dioxide is a crumbly water soluble solid (this requires all germanium devices to be packaged in expensive metal or glass hermetically sealed cases and making germanium integrated circuits almost impossible)
