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What else can I help you with?
What is the junction resistance of pn junction diode?
The resistance of a forward biased pn junction is zero.
Why germanium and silicon are considered as best semiconductors?
actually diamond should be much better, if fabrication issues can be solved, it is faster and will operate up to 600ºC junction temperature. Silicon is limited to 150ºC junction temperature and Germanium is limited to 50ºC to 60ºC. Germanium was originally used because it was easiest to purify and process. Silicon is the cheapest material now, it comes from sand and there is no shortage of that.
What is the most familiar semiconductor?
silicon and germanium
What temperature does a standard CPU melt?
CPUs are made of silicon, which melts at about 1400 degrees centigrade. However, other components of the CPU would be damaged long before the chip reached this temperature.
What is the resistance of SCR anode and Cathode?
The resistance of a Silicon Controlled Rectifier (SCR) anode and cathode is typically very low when the SCR is in the forward conducting state, allowing current to flow easily. In the reverse state, the resistance is very high, effectively blocking current flow. The exact resistance values can vary based on the specific SCR model and operating conditions, but the general principle remains the same: low resistance in the forward direction and high resistance in the reverse direction.
Which element increases its electrical conductivity as its temperature increases?
The element that increases its electrical conductivity as its temperature increases is typically a metal, such as copper or silver. This behavior is due to more free electrons being available to carry electric current at higher temperatures, leading to an increase in conductivity.
What Materials that have positive temperature coefficient?
Some materials with a positive temperature coefficient of resistance include silicon, germanium, and thermistors made of certain metal oxides like manganese, cobalt, and copper. These materials exhibit an increase in resistance with an increase in temperature, making them useful in temperature-sensing applications.
What is the specific resistance of pure silicon?
The specific resistance of pure silicon is around 2300 ohm-cm at room temperature.
What do you mean by negative temperature coffecient of silicon?
It strictly means the temperature coeffecient of a particular property of silicon: as the temperature rises, the value of this property falls. Such as electrical resistance.
What happens to the proportion of iron oxide in volcanic rock as the level of silicon dioxide increases?
THe amount of iron oxide decreases as the level of silica increases.
Why does the resistance of a conductor rise with temperature?
The mechanism of metallic resistance : as temperature increases the thermal vibrations in the lattice increase causing more electron scattering therefore more collisions will take place, slowing down the electron flow. This increases the rate of transfer of electrical energy by heating and increases the electrical resistance. The semiconductor's electrons also vibrate more at higher temperature so this contributes to resistance increase in the same way as for a metal. So what else could make the semiconductor conduct better? The answer is: more charge carriers. Whereas the number of free electrons in a metal is constant the effect of heating a semiconductor frees additional electrons (and holes). For silicon in this temperature range the effect of additional charge carriers outweighs the effect of additional vibrations, so the overall resistance will decrease with temperature.
What happens when heat is added to pure silicon?
An intrinsic (pure) silicon crystal at room temperature has sufficient heat (thermal) energy for some valence electrons to jump the gap from the valence band into the conduction band, becoming free electrons.
How can a silicon diode measure temperature?
Thanks to the property that a conductor's resistance is influenced by temperature (mainly, it increases accordingly). This property is specifically extended in materials used to construct such diodes. It is important to remember that silicon does not a semiconductor device make. It takes layers of semiconducting material (with the occasional isolator) and impurities specifically included into the mix to alter the device's behavior.
What happened when heat is added to a silicon?
When heat is added to silicon, its atoms gain energy and vibrate more rapidly, which can lead to changes in its electrical properties. Silicon's conductivity increases with temperature, making it more conductive as heat is applied. Silicon is commonly used in electronic devices due to its semiconducting properties that are influenced by temperature changes.
What does it mean for a substance to be semiconductor?
A substance as germanium or silicon whose electrical conductivity is intermediate between that of a metal and an insulator; its conductivity increases with temperature and in the presence of impurities. :) Hope that helped;)
Is silicone a solid liquid or gas?
silicon is a solid silicon is a solid
Why does heat decrease when it is insulated?
When Insulator's temperature increases, the resistance decreases because an increase in temperature brings about the random mobility of the materials with which the resistance is made up with and this in turn leads to the conduction of the material since they are made of semiconductor materials like silicon and germanium.
