What is PN Junction ? What is PN Junction ?

What is PN Junction ? What is PN Junction ?
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1 Answer

Answer :

When a P-type semiconductor makes a suitable connection with an N-type semiconductor in a special way, the connection surface is called PN junction.
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Description : What is junction ?

Last Answer : Junction is the process of connecting two or more electronic devices.

The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge

Description : The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge

Last Answer : The answer is 'Rectifier'

The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge

Description : The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge

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An ohmmeter used to test for front-to-back resistance of a PN junction diode should produce roughly what ratio? A. 100:01:00 B. 500:01:00 C. 1000:01:00 D. 5000:01:00

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Last Answer : Answer: A

The unidirectional property of a pn-junction is useful for its use as which thing

Description : The unidirectional property of a pn-junction is useful for its use as which thing

Last Answer : Rectifier

Write some applications of PN junction diode

Description : Write some applications of PN junction diode

Last Answer : 1. Rectifier circuit ii. clipping and clamping iii voltage multiplier iv AM detection v. Feedback diodes vi Freewheeling diode

What is depletion region in PN junction?

Description : What is depletion region in PN junction?

Last Answer : The region around the junction from which the mobile charge carriers ( electrons and holes) are depleted is called as depletion region.since this region has immobile ions, which are electrically charged , the depletion region is also known as space charge region.

When a PN junction is forward biased, what happens to the depletion region?

Description : When a PN junction is forward biased, what happens to the depletion region?

Last Answer : The depletion region decreases.

What is the main difference in construction between normal PN junction diodes and tunnel diodes?

Description : What is the main difference in construction between normal PN junction diodes and tunnel diodes?

Last Answer : The amount of doping.

Which breakdown theory explains the action that takes place in a heavily doped PN-junction with a reverse bias of less than 5 volts?

Description : Which breakdown theory explains the action that takes place in a heavily doped PN-junction with a reverse bias of less than 5 volts?

Last Answer : Zener effect.

The action of a PN-junction during breakdown can be explained by what two theories?

Description : The action of a PN-junction during breakdown can be explained by what two theories?

Last Answer : Zener effect and avalanche effect.

In a reverse biased PN-junction, which current carriers cause leakage current?

Description : In a reverse biased PN-junction, which current carriers cause leakage current?

Last Answer : The minority carriers

What type of bias opposes the PN junction barrier?

Description : What type of bias opposes the PN junction barrier?

Last Answer : Forward.

In order to reverse bias in a PN junction, what terminal of a battery is connected to the P material?

Description : In order to reverse bias in a PN junction, what terminal of a battery is connected to the P material?

Last Answer : Negative.

What is the name of the area in a PN junction that has a shortage of electrons and holes?

Description : What is the name of the area in a PN junction that has a shortage of electrons and holes?

Last Answer : Depletion region

What is the purpose of a PN junction diode?

Description : What is the purpose of a PN junction diode?

Last Answer : To convert alternating current into direct current

What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?

Description : What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?

Last Answer : Larger microwave power outputs.

The varactor is a pn junction that acts as what type of electronic device?

Description : The varactor is a pn junction that acts as what type of electronic device?

Last Answer : Variable capacitor.

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Description : A pn-junction diode emits light by spontaneous emission ∙ A. LED ∙ B. APD ∙ C. PIN

Last Answer : A. LED

If PN junction is forward biased its resistance is (a) Zero (b) Infinity (c) A few ohm (d) A few kilo ohms

Description : If PN junction is forward biased its resistance is (a) Zero (b) Infinity (c) A few ohm (d) A few kilo ohms

Last Answer : c) A few ohm

State any Four applications of PN junction diode.

Description : State any Four applications of PN junction diode.

Last Answer : 1. Rectifiers in power supplies, 2. Detectors in RF, 3 .Clippers, 4. In clamping networks used as DC Restorers, 5. As switches in digital logic circuits.

Describe the working of PN junction diode with neat sketch under forward biased condition.

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Last Answer : If the p-region (anode) is connected to the positive terminal of the external DC source and nside (cathode) is connected to the negative terminal of the DC source then the biasing ... The large number of majority carriers crossing the junction constitutes a current called as the forward current.

Describe avalanche and zener breakdown of PN junction with neat graph.

Description : Describe avalanche and zener breakdown of PN junction with neat graph.

Last Answer : Avalanche Breakdown It is observed in diodes having Vz> 8V. is called Avalanche Breakdown It occurs due to accelerating minority carriers. It shows gradual change. Breakdown voltage ... field. Breakdown is very sharp. Breakdown voltage decreases with increase in temperature 

Define Depletion region and Barrier voltage of PN junction.

Description : Define Depletion region and Barrier voltage of PN junction.

Last Answer : 1. Depletion region : The region consisting of immobile positive charge at n-side and immobile negative charge at p-side near the junction acts like a barrier and prevents the further flow of ... charge formed at the p-n junction is called barrier voltage, barrier potential or junction barrier.

Plot and explain I -V characteristics of a PN junction diode.

Description : Plot and explain I -V characteristics of a PN junction diode. 

Last Answer : V-I characteristics of PN junction diode: Explanation:  Forward Bias:  If the external voltage applied on the silicon diode is less than 0.7 volts, the silicon diode ... reverse breakdown voltage.  * Diode breakdown occurs by two mechanisms: Avalanche breakdown and Zener breakdown.

Gold is often diffused into silicon PN junction devices to

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Last Answer : To  increase  the  combinational  rate  at  the  pn  junction

A forward-biased PN-junction,

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Last Answer : A forward-biased PN-junction,  results in increase in diffusion current 

In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N

Description : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping (A) N-side depletion region is small as compared to p-side depletion region (B) N-side ... depletion region (C) N-side depletion region is same as p-side depletion region (D) Cannot say

Last Answer : In a PN-junction with open circuit terminal (equilibrium), with P doping higher as compared to N doping N-side depletion region is small as compared to p-side depletion region

The p-type substrates in a conventional pn-junction isolated integrated circuit should be connected to:

Last Answer : The p-type substrates in a conventional pn-junction isolated integrated circuit should be connected to: The most negative potential available in the circuit.

A UJT has - - - PN Junction

Last Answer : A UJT has one PN Junction

The leakage current in a pn junction is of the order of

Description : The leakage current in a pn junction is of the order of

Last Answer : The leakage current in a pn junction is of the order of µA.

With forward bias to a pn junction , the width of depletion layer ………

Last Answer : With forward bias to a pn junction , the width of depletion layer Decreases.

The leakage current across a pn junction is due to …………..

Last Answer : The leakage current across a pn junction is due to Minority carriers.

A pn junction acts as a ……….

Last Answer : A pn junction acts as a Unidirectional switch.

A reverse bias pn junction has …………

Last Answer : A reverse bias pn junction has Almost no current.

In the depletion region of a pn junction, there is a shortage of ……..

Last Answer : In the depletion region of a pn junction, there is a shortage of Holes and electrons.

The battery connections required to forward bias a pn junction are ……

Last Answer : The battery connections required to forward bias a pn junction are +ve terminal to p and –ve terminal to n.

The leakage current of PN junction is caused by?

Description : The leakage current of PN junction is caused by?

Last Answer : The leakage current of PN junction is caused by heat energy.

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Description : What is the conductivity of molar ?

Last Answer : The density of a solution as cm. When one mole of electrolytic substance is dissolved in it, the conductivity obtained by multiplying it by the relative conductivity of the solution is called molecular conductivity of the solution .

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Description : What is Zener Diod ?

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Description : What is the multiplying factor of shunt ?

Last Answer : Answer : The ratio of load or matte current to ammeter current is called shunt multiplying power.

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Description : What is ammeter shunt ?

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Description : What is short circuit current ?

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Description : What are symmetrical and asymmetrical faults ?

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Description : What is Basbar and Bas Kaplar ?

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