A UJT has - - - PN Junction

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1 Answer

Answer :

A UJT has one PN Junction

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Related questions

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.

The UJT has how many PN junctions?

Description : The UJT has how many PN junctions?

Last Answer : One.

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.

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

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.

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

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.

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.

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

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.

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.

A Transistor has - - - PN junctions

Last Answer : A Transistor has Two PN junctions

An SCR has - - - PN junctions

Last Answer : An SCR has Three PN junctions

In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of

Description :  In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of dissimilar metals is heated and the free or cold ends are connected to a milli-voltmeter? A) Kelvin effect B) Hot wire effect C) Seebeck effect D) Faraday effect 

Last Answer :  In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of dissimilar metals is heated and the free or cold ends are connected to a milli-voltmeter? A) Kelvin effect B) Hot wire effect C) Seebeck effect D) Faraday effect 

What is the correct sequence of the following step in the fabrication of a monolithic, bipolar junction

Description : What is the correct sequence of the following step in the fabrication of a monolithic, bipolar junction transistor? 1. Emitter diffusion 2. Base diffusion 3. Buried layer formation 4. Epi-layer formation Select the correct answer using the codes given ... 2) 4, 3, 1, 2 (3) 3, 4, 2, 1 (4) 4, 3, 2, 1 

Last Answer : What is the correct sequence of the following step in the fabrication of a monolithic, bipolar junction transistor? 1. Emitter diffusion 2. Base diffusion 3. Buried layer formation 4. Epi-layer formation Select the correct answer using the codes ... ) 4, 3, 1, 2 (3) 3, 4, 2, 1 (4) 4, 3, 2, 1 

P-N junction is....

Description : P-N junction is  A) a rectifier B) an amplifier C) an oscillator  D) a coupler

Last Answer : P-N junction is a rectifier.

The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________. A. UJT or BJT B. BCD or OCD C. JFET or IGFET D. LED or LCD

Description : The seven segment arrangement for numerical display on consoles, test meters and other applications can be either ________________. A. UJT or BJT B. BCD or OCD C. JFET or IGFET D. LED or LCD

Last Answer : Answer: D

Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT

Description : Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT

Last Answer : Ans: Power MOSFET

What is the normal current path for a UJT?

Description : What is the normal current path for a UJT?

Last Answer : From base 1 to the emitter.

The sequential rise in voltage between the two bases of the UJT is called what?

Description : The sequential rise in voltage between the two bases of the UJT is called what?

Last Answer : A voltage gradient

The area between base 1 and base 2 in a UJT acts as what type of common circuit component?

Description : The area between base 1 and base 2 in a UJT acts as what type of common circuit component?

Last Answer : Variable resistor.

Draw the characteristics of UJT and state its working principle.

Description : Draw the characteristics of UJT and state its working principle.

Last Answer : The characteristics of Unijunction Transistor (UJT) can be explained by three parameters: * Cutoff Region * Negative Resistance Region * Saturation Region Cutoff Region : The ... in its ON position. The emitter voltage VE remains almost constant with the increasing emitter current.