The UJT has how many PN junctions?

The UJT has how many PN junctions?
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1 Answer

Answer :

One.
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Related questions

A UJT has - - - PN Junction

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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.

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Last Answer : Basic E-type junctions.

The magic-T is composed of what two basic types of T junctions?

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Last Answer : E-type and H-type.

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

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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 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?

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What is the purpose of a PN junction diode?

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

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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?

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

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

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

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Description : Draw the circuit and explain the operation of UJT relaxation oscillator. 

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State the working principle of UJT

Description : State the working principle of UJT

Last Answer : Figure shows the equivalent circuit of a unijunction transistor with voltage source VEE connected across emitter and base 1 and VBB connected across base 1 and base 2. Hence the Emitter diode is reversed ... emitter current begins to flow ,the UJT is said to be fired, triggered or turned on.

With neat diagram explain synchronized UJT triggering circuit.

Description : With neat diagram explain synchronized UJT triggering circuit.

Last Answer : Line Synchronized UJT triggering circuit: The UJT is almost ideal as a firing device for SCRs. There are 2 main reasons for the compatibility between UJTs and SCRs. Firstly, the UJT produces a ... , the SCR is sure to have the right polarity between the anode and cathode for turning on.

Describe triggering of SCR using UJT relaxation oscillator.

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Draw and explain the characteristic of UJT.

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A UJT can........

Description : A UJT can   (A) be triggered by any one of it's three terminals (B) not be triggered (C) be triggered by two of its three terminal only (D) be triggered by all of its terminals only.

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In the emitter characteristic of UJT, the negative resistance portion.

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Last Answer : In the emitter characteristic of UJT, the negative resistance portion. lasts until the valley point is reached

To turn a UJT ON, the forward bias on emitter diode should be:

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Last Answer : To turn a UJT ON, the forward bias on emitter diode should be: more than the peak point voltage 

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