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Thermal runaway is not possible in FET because as the temperature of FET increase?
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∙ 12y ago
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∙ 12y ago
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What is the effect of temperature on transistor?
conductivity of semiconductors increases with increase in temperature as breakdown of covalent bonds take place in the semiconductor due to increase in temp but more & more increase in the temp may result in the breakdown or damage of the semiconductor which results in the decrease in conductivity of semiconductor
Why semiconductor has negative temperature coefficient of resistance?
Actually, the BJT is a positive temperature coefficient device. As they get warm, hFe increases, causing more current flow. This can lead to thermal runaway. That is why most class A common emitter configurations use an emitter resistor to place limits on the hFe demand, eliminating thermal drift and runaway.
What are the possible remedies against corona because of extra high voltage?
increase the size of conductor ,provide the hallow conductor,increase the critical disruptive voltage bv providing shunt capacitors. these capacitors increases the power capacity of the line.
What is the effect of temperature on ohms law?
AnswerOne of the conditions for Ohm's Law to apply is that the temperature of a conductor MUST remain constant. And, unfortunately, this is difficult to achieve because as the applied voltage increases, the resulting current causes the temperature of the conductor to rise -thus negating Ohm's Law!!For Ohm's Law to apply, the ratio of voltage to current must remain constant for variations in voltage. If it doesn't, then the conductor/device is NOT obeying Ohm's Law. Period! So if, for example, you increase the voltage across a lamp, you will find that the ratio varies as the voltage increases, and this is because the resistance is increasing due to an increase in temperature. So, in this example, the temperature is the reason why lamps don't obey Ohm's Law.
Why voltage divider bias is called self bias?
This arrangement is called SELF-BIAS. Now, if an increase of temperature causes an increase in collector current, the collector voltage (VC) will fall because of the increase of voltage produced across the load resistor (RL). ... One of the most widely used combination-bias systems is the voltage-divider type
Thermal energy added to a substance that is not changing state causes the substances temperature to do what?
The temperature of the substance will increase when thermal energy is added without changing state. This is because the thermal energy is causing the particles within the substance to move faster, resulting in an increase in temperature.
What is the increase of the volume of a substance by the increase of temperature called?
The increase in volume of a substance due to an increase in temperature is called thermal expansion. This occurs because as the temperature of a substance rises, the particles within it gain energy and move more, causing them to spread out and increase in volume.
How does thermal radiation change as a body emitting it changes temperature?
As a body's temperature increases, its thermal radiation also increases. This is because thermal radiation is directly proportional to the fourth power of temperature according to the Stefan-Boltzmann law. This means that a small increase in temperature results in a significant increase in the amount of thermal radiation emitted.
What is the increase in volume of a material due to a temperature increase is called?
The increase in volume of a material due to a temperature increase is called thermal expansion. This occurs because as the temperature of a material rises, its particles gain kinetic energy, causing them to move more and increase the spacing between them, which leads to an increase in volume.
What is an increase in the size of a substance in response to an increase in the substance's temperature?
An increase in size of a substance in response to an increase in temperature is known as thermal expansion. This occurs because as temperature rises, the particles in the substance gain more energy and move faster, causing the substance to expand. Thermal expansion is a common phenomenon observed in solids, liquids, and gases.
What is the increase in volume that results from an increase in temperature called?
The increase in volume that results from an increase in temperature is called thermal expansion. This occurs because temperature changes cause the particles in a substance to move faster and spread out, leading to an increase in volume.
Why does thermal energy depends on temperature?
Thermal energy is the internal energy of a substance due to the movement of its atoms and molecules. As temperature increases, the speed of the particles also increase, leading to more kinetic energy and thus higher thermal energy. Therefore, thermal energy depends on temperature because it is directly related to the average kinetic energy of the particles in a substance.
Thermal runaway is not possible in FET because of?
Thermal runaway is not possible in FET because of?
What kind of energy increases when temperature increases?
The kinetic energy of particles increases when temperature increases. This is because the particles move faster and collide more frequently at higher temperatures, leading to an overall increase in thermal energy.
What does a substance gain or lose when its temperature changes?
The density of the substance becomes higher because of the particles slow down and move closer together when the substance cools.
How does mass affect thermal energy?
Mass affects thermal energy by determining the amount of heat required to raise the temperature of an object. Objects with a greater mass require more heat to increase their temperature compared to objects with lower mass. This is because more particles need to be energized in larger objects, resulting in more thermal energy being absorbed.
What causes an increase in thermal energy?
An increase in thermal energy is caused by an increase in temperature of a substance, which leads to the molecules moving faster and having more kinetic energy. Other factors that can increase thermal energy include adding heat to a system or increasing the number of molecules in a system.
