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.
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Sep 5, 2018
by
anonymous
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.
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678 views
1 answer
asked
Mar 29, 2018
by
anonymous
Last Answer : In Reverse bias of diode when the cathode is connected to positive and anode is connected to negative very small current flows this very small current is known as leakage current of diode.
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86 views
1 answer
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Sep 27, 2017
by
anonymous
Leakage current flows through the thyristor in
Last Answer : Leakage current flows through the thyristor in Forward blocking mode and Reverse blocking mode.
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211 views
1 answer
asked
May 8, 2018
by
anonymous
applications of P-N junction diode
Last Answer : 1.It is used as rectifier in DC power supply 2.It is used as free wheel diode across relay or inductive load 3.It is used as switch in logic circuits used in computers 4.It is used as detector in demodulation circuits of communication receiver
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72 views
1 answer
asked
Aug 19, 2019
by
anonymous
Define junction field effect transistor (JFET) and give an example.
Last Answer : Junction Field-Effect Transistor: It is a semiconductor device having three terminals, namely Gate, Drain and Source, in which the current flow is controlled by an electric field set up by an external voltage applied ... : i) n-channel JFET and ii) p-channel JFET Examples of JFET: BFW 10, BFW 11
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216 views
1 answer
asked
Sep 5, 2018
by
anonymous
A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of 600 C/W. If the ambient temperature is 300o C ... the device will be A) 1.52 W B) 1.72 W C) 1.92W D) 2.00 W
Last Answer : A certain power MOSFET has a maximum junction temperature specification of 1500o C, a junction-to-case thermal resistance of 1.00 C/W, and a junction-to ambient thermal resistance of ... 300o C, then the maximum allowable power dissipation in the device will be 2.00 W
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148 views
1 answer
asked
Jun 18, 2018
by
anonymous
How To Prevent Leakage In Radiators ?
Last Answer : How To Prevent Leakage In Radiators How To Prevent Leakage In Radiators Pinholes can develop in radiators that lead to leakage. The cause is usually corrosion due to excessive air or mud that might have ... leakage. Raw egg or black pepper can also be put in the radiator to stop the leakage.
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9 views
1 answer
asked
May 9, 2021
by
anonymous
Why does leakage occur in a magnetic circuit?
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121 views
0 answers
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May 5, 2020
by
anonymous
Define leakage factor.
Last Answer : It is the ratio of total flux to leakage flux.
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58 views
1 answer
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May 5, 2020
by
anonymous
what is earth leakage?
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State function of starter and ELCB. (Earth Leakage Circuit Breaker)
Last Answer : i) Function of Starter:- 1. To prevent the high starting current OR to minimize the starting current. 2. To give supply failure protection 3. To give over load and short circuit protection ... an installation and cut off the circuit from power supply and avoid electrical shock to the person.
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456 views
1 answer
asked
Sep 18, 2018
by
anonymous
Describe the concept of leakage flux, useful flux and fringing with neat diagram.
Last Answer : Leakage Flux
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1.1k views
2 answers
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Sep 4, 2018
by
anonymous
Define useful flux, leakage flux and fringing.
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127 views
0 answers
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Aug 8, 2018
by
anonymous
Explain the leakage flux and its effect with the help of neat diagram.
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229 views
0 answers
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Aug 8, 2018
by
anonymous
Last Answer : In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.
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94 views
2 answers
asked
Sep 27, 2017
by
anonymous
In a reverse biased PN-junction, which current carriers cause leakage current?
Last Answer : The minority carriers
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6 views
1 answer
asked
Aug 20, 2021
by
anonymous
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Last Answer : The leakage current across a pn junction is due to Minority carriers.
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189 views
1 answer
asked
Mar 29, 2018
by
anonymous
Last Answer : A UJT has one PN Junction
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178 views
1 answer
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Mar 29, 2018
by
anonymous
Define: i) Input Offset Voltage ii) Input offset Current iii) Input Bias Current iv) Output offset voltage
Last Answer : Definition of parameters of OPAMP is follows: i) Input Offset Voltage: Input offset voltage is defined as the voltage that must be applied between the two input terminals of an OPAMP to null or ... to ground) and output voltage is obtained non zero such voltage is output offset voltage of opamp.
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675 views
1 answer
asked
May 2, 2020
by
anonymous
What is the current gain?
Last Answer : Current gain β = Ic/Ib
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79 views
1 answer
asked
Mar 10, 2018
by
anonymous
Which configuration has the lowest current gain ?
Last Answer : Common base configuration has the lowest current gain.
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104 views
1 answer
asked
Mar 8, 2018
by
anonymous
Last Answer : In BJT there is movement of electrons and holes accros the junctions which is basicaly current flow.
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363 views
2 answers
asked
Sep 10, 2017
by
anonymous
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The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge
Last Answer : The answer is 'Rectifier'
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1 answer
asked
Feb 2
by
anonymous
The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge
Last Answer : answer:
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1 answer
asked
Feb 2
by
anonymous
The unidirectional property of a pn-junction is useful for its use as which thing? -General Knowledge
Last Answer : answer:
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1 answer
asked
Feb 2
by
anonymous
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.
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1 answer
asked
Jan 27
by
anonymous
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
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4 views
1 answer
The unidirectional property of a pn-junction is useful for its use as which thing
Last Answer : Rectifier
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2 views
1 answer
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
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1 answer
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.
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1 answer
When a PN junction is forward biased, what happens to the depletion region?
Last Answer : The depletion region decreases.
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1 answer
asked
Aug 20, 2021
by
anonymous
What is the main difference in construction between normal PN junction diodes and tunnel diodes?
Last Answer : The amount of doping.
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1 answer
asked
Aug 20, 2021
by
anonymous
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.
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8 views
1 answer
asked
Aug 20, 2021
by
anonymous
The action of a PN-junction during breakdown can be explained by what two theories?
Last Answer : Zener effect and avalanche effect.
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2 views
1 answer
asked
Aug 20, 2021
by
anonymous
What type of bias opposes the PN junction barrier?
Last Answer : Forward.
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1 answer
asked
Aug 20, 2021
by
anonymous
In order to reverse bias in a PN junction, what terminal of a battery is connected to the P material?
Last Answer : Negative.
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8 views
1 answer
asked
Aug 20, 2021
by
anonymous
What is the name of the area in a PN junction that has a shortage of electrons and holes?
Last Answer : Depletion region
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30 views
1 answer
asked
Aug 20, 2021
by
anonymous
What is the purpose of a PN junction diode?
Last Answer : To convert alternating current into direct current
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1 answer
asked
Aug 20, 2021
by
anonymous
What is the primary advantage of bulk-effect devices over normal pn-junction semiconductors?
Last Answer : Larger microwave power outputs.
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1 answer
asked
Aug 19, 2021
by
anonymous
The varactor is a pn junction that acts as what type of electronic device?
Last Answer : Variable capacitor.
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7 views
1 answer
asked
Aug 19, 2021
by
anonymous
A pn-junction diode emits light by spontaneous emission ∙ A. LED ∙ B. APD ∙ C. PIN
Last Answer : A. LED
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7 views
1 answer
asked
Aug 16, 2021
by
anonymous
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
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13 views
1 answer
asked
Aug 4, 2021
by
anonymous
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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.
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23 views
1 answer
asked
Mar 18, 2021
by
anonymous
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.
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40 views
2 answers
asked
Mar 17, 2021
by
anonymous
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
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29 views
1 answer
asked
Mar 17, 2021
by
anonymous
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.
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561 views
2 answers
asked
Sep 4, 2018
by
anonymous
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
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177 views
2 answers
asked
May 16, 2018
by
anonymous
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
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109 views
1 answer
asked
May 12, 2018
by
anonymous
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
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73 views
1 answer
asked
May 12, 2018
by
anonymous
