What is a Diode?
A Diode is Device which can only allow current to flow in only one direction if it is operated within the specified level of voltage.
1.It is unidirectional Device.
2. It is made up of two semiconductors one is p-type semiconductor and another is n-type semiconductor.
3. In P-type semiconductor majority charge carriers are Holes & minority charge carrier are electrons
4. In N-type semiconductor majority charge carriers are electrons & minority charge carrier are electrons.
5. A P-N junction is the simplest form of the Diode which behaves as a short circuited when the diode is said to be forward biased
6. A P-N Junction diode behaves as a open circuit when it reverse biased.
7. A arrangement of a diode can convert AC to a pulsating DC and so it is sometimes also called as a rectifier.
8. Diode means DI + ODE which means a device which has two Electrodes and these Electrodes are nothing but Anode (A) and Cathode (K).
9.
5. A P-N junction is the simplest form of the Diode which behaves as a short circuited when the diode is said to be forward biased
6. A P-N Junction diode behaves as a open circuit when it reverse biased.
7. A arrangement of a diode can convert AC to a pulsating DC and so it is sometimes also called as a rectifier.
8. Diode means DI + ODE which means a device which has two Electrodes and these Electrodes are nothing but Anode (A) and Cathode (K).
9.
Simple Diode Structure
10. Symbol of Diode
Sir is dc current is pulsating in nature ..
ReplyDeletePoint 7
Yes the output of the rectifier is Pulsating DC in nature and this makes it unsuitable for the electronic circuit so to reduce this variation of the output voltage we connect a capacitor across the load voltage.
DeleteWhat is the density of electrons and holes in N and P type semiconductor
ReplyDeleteSome Electrons and Holes are always present whether dopants are present or not if their is no dopants a semiconductor is said to be intrinsic. the nonzero p & n are the result of the thermal excitation, which moves some of the electron from the valance band into the conduction band and these movements of electrons and holes creates a pairs n=p in intrinsic semiconductor. therefore at room temperature for silicon 10^10 Cm^-3.
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