Test: Other Thyristor Members
20 Questions MCQ Test Power Electronics | Test: Other Thyristor Members
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_________ device from the thyristor family has its gate terminal connected to the n-type material near the anode.
PUT is Programmable Unijunction Transistor which is a p-n-p-n device just like the SCR with its gate connected to the n-type material.
The Programmable Unijunction Transistor (PUT) turns on & starts conducting when the
The device only starts to conduct when the forward anode to cathode voltage exceeds the applied gate to cathode voltage.
The equivalent circuit of SUS (Silicon Unilateral Switch) consists of
It is a diode connected in anti-parallel with a PUT.
From the following list of devices, choose the device that only turns-on for a fixed-value of anode-cathode voltage
Unlike the other devices the SUS only turns-on for a fixed value of anode to cathode voltage.
The SCS is a four terminal device A,K,KG & AG.
The SCS is a four layer, four terminal thyristor. Can be turned on by
The SCS has two gates, anode-gate and cathode-gate. Either of the gates could be used to turn on the device.
The SCS (Silicon Controlled Switch) can be turned on by two methods, by applying __________ and __________
Either of the gates could be used to turn on the device.
Which of the following devices provide complete isolation between triggering circuit and power circuit?
Complete Isolation between triggering circuit & power circuit is the major advantage of using LASCR as they are light activated or light trigged.
The DIAC is nothing but a bi-directional diode.
The TRIAC is a bidirectional SCR.
It is just like a GTO but it is p-n-n device.
The SITH has 3 terminals viz. gate, anode and cathode.
The Static Induction Thyristor is a p+ n+ diode with p+ electrodes.
The SITH unlike other devices is a normally on-device which can be switched off as and when required
Load current flows from anode to cathode as the p+ junction is forward biased.
In SITH, the magnitude of the anode current can be controlled by
Controlling the negative gate bias controls the main anode current.
It has no reverse blocking capabilities due to emitter-shorting
TRAIC has MT1, MT2 and a gate.
A diode in anti-parallel with the SCR is called as a RCT.
The TRIAC is most sensitive in the _________ quadrants
It is the most sensitive when all the voltage,current and gate signal have the same polarities.
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