What is the purpose of a PN junction diode?

What is the purpose of a PN junction diode?
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1 Answer

Answer :

To convert alternating current into direct current
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Related questions

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

Description : 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

Last Answer : Answer: A

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

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

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

Last Answer : A. LED

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.

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

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.

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.

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 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.

What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?

Description : What type of PN diode is formed by using a fine metal wire and a section of N-type semiconductor material?

Last Answer : Point-contact.

What is the capacitive reactance across a point-contact diode as compared to a normal junction diode?

Description : What is the capacitive reactance across a point-contact diode as compared to a normal junction diode?

Last Answer : Lower.

What is the junction arrangement of the original avalanche transit-time diode?

Description : What is the junction arrangement of the original avalanche transit-time diode?

Last Answer : Pnin.

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

Last Answer : answer:

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 : answer:

What is PN Junction ? What is PN Junction ?

Description : What is PN Junction ? What is PN Junction ?

Last 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.

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

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.

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

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.

Gold is often diffused into silicon PN junction devices to

Description : Gold is often diffused into silicon PN junction devices to   (A) increase the recombination rate (B) reduce the recombination rate (C) make silicon a direct gap semiconductor (D) make silicon semi-metal

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

A forward-biased PN-junction,

Description : A forward-biased PN-junction,  (A) results in increase in diffusion current  (B) results in increase in drift current  (C) results in decrease in drift current  (D) results in decrease in diffusion current

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.

Which of the listed conditions is an advantage of a PN diode over a vacuum diode? A. Longer life. B. No warm up time. C. Less delicate. D. All of the above.

Description : Which of the listed conditions is an advantage of a PN diode over a vacuum diode? A. Longer life. B. No warm up time. C. Less delicate. D. All of the above.

Last Answer : Answer: D

The UJT has how many PN junctions?

Description : The UJT has how many PN junctions?

Last Answer : One.

The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2 + P3 +...Pn. Why can this formula be used for both series and parallel circuits?

Description : The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2 + P3 +...Pn. Why can this formula be used for both series and parallel circuits?

Last Answer : In both cases all the power used in the circuit must come from the source.

During the manufacture of a point-contact diode, what is the purpose of passing a relatively large current from the catwhisker to the silicon crystal?

Description : During the manufacture of a point-contact diode, what is the purpose of passing a relatively large current from the catwhisker to the silicon crystal?

Last Answer : . To form a small region of p-type material

What is the purpose of the circulator in a tunnel-diode amplifier?

Description : What is the purpose of the circulator in a tunnel-diode amplifier?

Last Answer : Prevent feedback to the tuned input circuit.

The pin diode is primarily used for what purpose?

Description : The pin diode is primarily used for what purpose?

Last Answer : A switching device.

Junction breakdown occurs: a) With forward bias b) With reverse bias c) Under high temperature condition d) Because of excess heating of the diode

Description : Junction breakdown occurs: a) With forward bias b) With reverse bias c) Under high temperature condition d) Because of excess heating of the diode

Last Answer : Ans: B

The waveform of a certain signal can be studied by – (1) Spectrometer (2) Cathode ray oscilloscope (3) p - n junction diode (4) Sonometer

Description : The waveform of a certain signal can be studied by – (1) Spectrometer (2) Cathode ray oscilloscope (3) p - n junction diode (4) Sonometer

Last Answer : (4) Sonometer Explanation: A spectrometer is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum. Cathode ray oscilloscope is an electronic display ... electron beam that is used to produce visible patterns or graphs on a phosphorescent screen.

Which of the following is used for regulated electric supply? (1) Zener diode (2) Junction diode (3) Gun diode (4) Tunnel diode

Description : Which of the following is used for regulated electric supply? (1) Zener diode (2) Junction diode (3) Gun diode (4) Tunnel diode

Last Answer : (1) Zener diode Explanation: The Zener diode is like a generalpurpose signal diode. When based in the forward direction it behaves just like a normal signal diode, but when a reverse voltage ... property. Many diodes described as "Zener" diodes rely instead on avalanche breakdown as the mechanism.