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actually in the case of transistors there are two concepts that are often misleaded
those are
1. order of doping
2. order of the size of various regions
order of doping emitter>collector>base
order of size of various regions collector>emitter>base now the reason for this
as CB junction is reverse biased more heat is dissipated at this junction so if the collector junction has large area the heat can be dissipated easily there by the transistor is saved from the burning of CB junction
Wiki User
∙ 11y ago
Wiki User
∙ 12y agocollector is made larger than that of base and emitter bacause the collector has to dissipate more power.
Anonymous
ollector is wider than emitter and base because it is the main function to collect majority charge carrier to base.
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Which definition describes a base?
Sodium hydroxide (NaOH) is a classic example of a strong base because it produces hydroxide (OH-) ions and dissociates completely in water. Ammonia is an example of a weak base because it is a proton acceptor.
A substance that has a pH of more than 7.0?
A Substance that has a Ph of more than 7.0 is anything basic or with a OH- Concentration exceed the H+ concentration by the Brønsted-Lowry base definition. A few examples of basic substances are soap, bleach, and most cleaning solutions, and milk also
What is a mature stream?
Is a river with a gradient that is less steep than those of youthful rivers and flows more slowly. It is fed by many tributaries and has more discharge than a youthful river and its channels erode wider rather than deeper.
Do acids have a pH greater than 7?
Acids do not have a pH greater than 7. When the pH is greater than 7, this makes it a base.
What is example of a base in science?
In chemistry, a base is a substance that typically will have a pH greater than 7 in an aqeuous solution. The opposite of an acid. It typically will accept a proton (H+). In biology, a base may be a basic building block: in the DNA molecule, you have a specific base-pairing, which consists of a a sugar and phosphate. In the DNA molecule, the base A (adenine) bonds with T (thymine), while C (cytosine) binds with G (guanine)
Why is junction capacitance of collector to base junction is lower than base to emitter junction?
The collector base depletion zone is wider than the emitter base depletion zone.
What is transistor action?
The transistor has three regions, emitter,base and collector. The base is much thinner than the emitter while the collector is wider than both. However for the sake of convenience the emitter and collector are usually shown to be of equal size. The transistor has two pn junctions that means it is like two diodes. The junction between emitter and base may be called emitter-base diode or simply the emitter diode.The junction between base and collector may be called collector-base diode or simply collector diode. The emitter diode is always forward biased and the collector diode is always reverse biased.
Why is collector current slightly less than emitter?
The percentage of doping in emitter is higher than collector region.hence large current is flow to emitter than collector.
Why is collector slightly less than emitter?
some of emitter current goes out base instead of collector
Is the base region much thinner or wider than collector and emitter regions?
yes its thinnerMost of the free electrons that have entered the base do notrecombine with holes because the base is very thin.
Why output of common emitter amplifier is inverted?
In a common emitter amplifier, the base-emitter current causes a corresponding collector-emitter current, in the ratio of hFe (beta gain) or collector resistance over emitter resistance, which ever is less. Since this ratio is usually greater than one, the differential collector current is greater than the differential base current. This results in amplification of the base signal. As you increase the base-emitter current, the collector-emitter current also increases. This results in the collector being pulled towards the emitter, with the result that the differential collector voltage decreases. This results in inversion of the base signal.
Why is collector current increased slowly with the increase of collector to emitter voltage of a common emitter?
The percentage of doping in emitter is higher than collector region.hence large current is flow to emitter than collector.
Why the base current in the transistor is so much less than the collector?
as the base current is very small compared to the emitter current,the collector current is nearly equal to the emitter current..
Why is the base current in a transistor so much less than the collector current?
as the base current is very small compared to the emitter current,the collector current is nearly equal to the emitter current..
Why is collector current less than emitter current?
The percentage of doping in emitter is higher than collector region.hence large current is flow to emitter than collector.
What is the working of a transistor?
For proper working of a transistor,the voltage at the base region must be more positive than that of the emitter region.The voltage at the collector region, in turn, must be more positive than that of the base region.when voltage is applied to transistor, the emitter supplies electron,which is pulled by the base from the emitter as it is more positive than the emitter.This movement of electrons from emitter to collector creates as flow of electricity through the transistor.The current passes from the emitter to the collector through the base.Thus, adjustment of voltage in the base region modifies the flow of the current in the transistor by changing the number of electron in the base region. In this way, small changes in the base voltage can cause large changes in the current flowing out of the collector. We have three transistor element, a.)Emitter b.)Base c.)Collector
Why collector is made larger than base and emitter in a transistor?
Collector has larger area than base and emitter because base collector is reverse biased, hence the current flow here due to the minority carriers and the large power dissipation takes place by the majority carriers, this power dissipated in the form of heat.. To cool the device from heat we made the larger area........
