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A diode is a silicon semiconductor meaning it will conduct one way because of the pphysical doping during manufacture
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How many pn junction transistor contain?
two jun. b/w three layer of either pnp or npn
In4001 diode what is IN in it?
It means that the semi conductor have only one pn junction
What is the dependence of reverse saturation current in a P-N diode on applied voltage and temperature?
In a PN junction diode, the reverse current is due to the diffusive flow of minority electrons from the p-side to the n-side and the minority holes from the n-side to the p-side. Hence IS, reverse saturation current depends on the diffusion coefficient of electrons and holes. The minority carriers are thermally generated so the reverse saturation current is almost unaffected by the reverse bias but is highly sensitive to temperature changes. so , as the temperature increases the density of minority charge carriers increases creating a slight increase in the amount of IC.so, the inference is reverse current is directly proportional to temperatureIn the reverse biased condition the PN diode is least dependent on voltage till certain limit called breakdown voltage, till that voltage the increase in V is not actually increasing the current it is just increasing the heat at the junction which in turn raises the temperature and so the minority charge carriers.But if the voltage increases the breakdown voltage the pn junction is lost and all the holes and electrons will start acting like charge carriers , such avalanche of charge carriers increases the current sharply to several hundred times. This phenomena is called as zener or avalanche breakdownso if applied voltage less than breakdown voltageno significant change in reverse current(only due to minority charge carriers)and if applied voltage greater than breakdown voltagethe pn junction break and current increases sharply (both due to minority and majority charge carriers)
How does electrical current flow in a circuit?
There is a potential difference (voltage) between two points and a path for electrons to travel from an area of low potential (negative) to an area of high potential (positive). Note the direction of "current flow" is opposite the direction of electron flow. In other words current flows from positive to negative. In a circuit involving only a resistor, the current flowing in the circuit is given by I=V/R where I = current, V= voltage, and R=resistance.
Why UPS is not charging on Inverter?
UPS (UNINTERUPTED POWER SUPPLY ) Its charg only AC current (Alternating current). and inverter provide current DC TO AC ( Direct current to Alternating current)
Is the current in one branch of a parallel circuit more than less than or equal to the total current entering the junction point of the circuit?
Answer: less. Answer: Kirchhoff's Current Law states that the sum of all currents into a junction (or out of a junction) must be zero. This refers to the algebraic some, that is, if you consider the current into the junction, any current entering the junction will be counted as positive, while any current leaving the junction will be counted as negative. Thus, any individual current will be equal to the negative of the sum of all the other branches at the junction.
Why use the PN junction diode in rectifier?
We use pn junction diode in rfctification as a rectifier becase it allows current to flow in one direction only, i.e. in forward biase only , and stop current to flow in reverse baised. thats why we use pn junction diode in rectification.
What will be the collector current of emitter base junction of a transister is reversed?
The question is poorly phrased and needs a grammatical cleanup. If you mean to ask "what happens to the collector-emitter current of a transistor when the emitter-base junction is reverse biased" then the answer is that the transistor will turn off, and you will only see leakage current.
Why semiconductors work on DC only?
the NP or PN junction only allows current to flow in one direction (think diode), therefor DC would be the only energy capable
Limitation of operating condition in p-n junction?
the p-n junction diode will perform satisfactorily only if it is operated within certain limiting values or conditions.The are :- 1. Maximum forward current : it is the highest instantaneous current under forward bias. 2.Peak inverse voltage: 3.maximum power rating:it is the maximum power that can be dissipated at the junction without damaging it.
What is forward bias current in semiconductor?
I think its related to junction of two dissimilar semiconductor (or semiconductor and metal) and not only a semiconductor. well when two opposite nature semiconductor (hetero or homo) are joined to form a junctions they allow the flow of current in one direction while blocks it in other direction. The applied bias V which will cause the current flow is called forward bias and the current flowing through the junction forward bias current.
What kind of currents has only one way to travel?
In DC circuits the current travels only in one direction.
Why line current is greater than phase current in delta connection?
Because if you apply Kirchhoff's Current Law to the junction between the line current and the two phase currents, the line current is the phasor (vector) sum of two phase currents. For a balanced load (only), this works out to 1.732 x phase current.
How far can 7.2kilowatt of electricity travel?
It depends upon what voltage pushes the current. Thousands of volts can push for miles. 120v common household current can only travel about 1000 feet or less.
What is unijunction tranjistor?
In unijunction transister there be a only one P-N Junction like diode, and current conduction takes place by either through holes or electrons.
How does PN-junction diode acts as a switch?
when a semiconductor is doped with p-type and n-type impurities, a pn junction is formed which acts as a diode and prevents the charge carriers to flow to either side of junctionpn juction diode is a semiconductor device that allows current to flow only to one direction.
Difference between bjt and ujt?
UJT is the voltage controlled device.in which only one mejority carriers are responsible for current flowing. UJT is one junction transistor and it is three terminal emitter and two base. BJT is the current controlled device. in which both mejority and minority carrier are responsiblefor current flowing. this type of transistor consists of two junction and three terminal these are : emitter , base , collector.
