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Calculate the intrinsic standoff ratio eta H of a UJT circuit where Rb1 is 1500 ohms and Rb2 is 265 ohms?
5.6 isn't the stand off ratio calcutaled by ===== Rb1/(Rb1+Rb2)
Describe the difference between a UJT and a PUT?
i. Constructional structures The UJT is made up of a lightly doped n-region known as the base region onto which is joined a small heavily doped p-region called the emmitter. The PUT on the other hand is a four layer device similar to an SCR except that the gate terminal of the PUT is connected to the n-region adjacent to the anode. ii.Operation The intrinsic stand-off ratio of a UJT is fixed hence operating characteristics can not be alterd. The PUT, on the other hand has operating characteristics that can be altered. These include base-base resistance,intrinsic stand-off voltage, valley current and peak current and all these can be altered by setting the values of two external resistors
Can UJT be used as an amplifier?
No we can not use it as amplfire .... it is used for switch on and off ... and frequency generator oscelator
Why does the soldering stand have a wet sponge in it?
The soldering stand has a wet sponge on it so you can wipe off and clean the soldering iron!
What is off nominal tap ratio off transformer?
It occurs when Vbase rotio of both side of the Transformer is not the same as the Rated Voltge rotio.
What does intrinsic stand off ratio of an ujt determine?
The amount of potential to forward bias it
Calculate the intrinsic standoff ratio eta H of a UJT circuit where Rb1 is 1500 ohms and Rb2 is 265 ohms?
5.6 isn't the stand off ratio calcutaled by ===== Rb1/(Rb1+Rb2)
What determines the amount of potential required to forward bias a unijunction transistor?
Intrinsic Stand-off Ratio
Describe the difference between a UJT and a PUT?
i. Constructional structures The UJT is made up of a lightly doped n-region known as the base region onto which is joined a small heavily doped p-region called the emmitter. The PUT on the other hand is a four layer device similar to an SCR except that the gate terminal of the PUT is connected to the n-region adjacent to the anode. ii.Operation The intrinsic stand-off ratio of a UJT is fixed hence operating characteristics can not be alterd. The PUT, on the other hand has operating characteristics that can be altered. These include base-base resistance,intrinsic stand-off voltage, valley current and peak current and all these can be altered by setting the values of two external resistors
Why ujt called current controlled negative resistance device?
The On/OFF action in UJT is controlled by emitter current
How does a ujt relaxation oscillator work?
The operation of the circuit is as follows: C1 charges through R1 until the voltage across it reaches the peak point. The emitter current then rises rapidly, discharging C1 through the base 1 region and R3. The sudden rise of current through R3 produces the voltage pulse. When the current falls to IV the UJT switches off and the cycle is repeated.
Can UJT be used as an amplifier?
No we can not use it as amplfire .... it is used for switch on and off ... and frequency generator oscelator
What is an UJT timer?
UJT is an abbreviation for (Unijunction Transistor) the electronic component that is at the heart of a simple timing circuit. A UJT timer is a circuit used in an electonic system to deliver a specific time. For instance, a 30 second UJT timer might be used to turn on a Green traffic signal for 30 seconds, then turn off. UJT is a specifically cheap way of doing this type of timed signal. Timers using UJTs have largely be superseded by timers based on a 555 integrated circuit.
Factors affecting intrinsic conductor?
temperature, mobility of electron hole as well as the mobility of electrons. It is also based off the boltzmann's constant and the Bandgap Energy value of the solid material used to make the intrinsic conductor
What are the release dates for Coffee Stand Off - 2010?
Coffee Stand Off - 2010 was released on: USA: 2010
When did Stand-off at the Fords of Arkaig happen?
Stand-off at the Fords of Arkaig happened on 1665-09-13.
Why you use cut-off ratio in diesel cycle not in Otto cycle?
We use cut-off ratio in diesel cycle and not in Otto cycle because it is cost effective.
