Test: GTOs


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10 Questions MCQ Test Power Electronics | Test: GTOs

Test: GTOs for Electrical Engineering (EE) 2023 is part of Power Electronics preparation. The Test: GTOs questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: GTOs MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: GTOs below.
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Test: GTOs - Question 1

The GTO (gate turn-off thyristor) is a

Detailed Solution for Test: GTOs - Question 1

Just like a SCR, the GTO is a four layer p-n-p-n device.

Test: GTOs - Question 2

The GTO can be turned off

Detailed Solution for Test: GTOs - Question 2

The GTO can be turned off by applying a negative gate pulse to the gate terminal.

Test: GTOs - Question 3

 The anode current is ideally limited by the

Detailed Solution for Test: GTOs - Question 3

The SCR or any device is connected through the load, hence the magnitude of the anode current (same as load current) will depend on the supply voltage and load impedance.

Test: GTOs - Question 4

In a GTO the n+ layer forms the

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The bottom n+ layer forms the cathode.

Test: GTOs - Question 5

The turn-off gain βoff of the GTO is given by

Detailed Solution for Test: GTOs - Question 5

 βoff = (anode current/gate current).

Test: GTOs - Question 6

A GTO can be represented by two transistors T1 & T2. The current gain of both transistors are α1 and α2 respectively. A low value of gate current requires

Detailed Solution for Test: GTOs - Question 6

 In order that the gate current for turning-off the device is low, α2 should be made as nearer to unity as possible whereas α1 should be small.

Test: GTOs - Question 7

Gold doped GTOs have _____________ as compared to the conventional GTOs

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Gold doping reduces the negative gate current requirements, different kinds of dopings have different advantages over the others.

Test: GTOs - Question 8

 Latching current for the GTOs is ________ as compared to CTs (Conventional thyristors).

Detailed Solution for Test: GTOs - Question 8

Latching current of GTOs is 2-4A as compared to 200 to 400 mA in case of CT’s.

Test: GTOs - Question 9

In case of the two-transistor model (T1 & T2) of GTO with anode-short, the anode-short is placed between the

Detailed Solution for Test: GTOs - Question 9

Draw the model. The anode-short resistor is connected between emitter (Anode A of GTO) with base of T1 transistor.

Test: GTOs - Question 10

Choose the correct statement:GTOs have _________ as compared to the CTs.

Detailed Solution for Test: GTOs - Question 10

GTOs have less turn-on and turn-off time, making it efficient for high frequency applications.

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