Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following statements is TRUE in the case of an IGBT?

Which of the following statements is TRUE in the case of an IGBT? Correct Answer Its ON-state voltage drop is very low

IGBT:

[ alt="LMRC EC 2018 50 20 Q Part 2 Hindi - Final 2" src="//storage.googleapis.com/tb-img/production/19/04/LMRC_EC_2018_50_20_Q_Part%202_Hindi%20-%20Final%202.PNG" style="text-align: -webkit-center; width: 123px; height: 126px;">

  • An insulated-gate bipolar transistor (IGBT) is a three-terminal power semiconductor device primarily used as an electronic switch.
  • It was developed to combine high efficiency and fast switching. Its on-state voltage drop is low compared to other thyristors.
  • It consists of four alternating layers (P-N-P-N) that are controlled by a metal–oxide semiconductor (MOS) gate structure without regenerative action.
  • It has very low ON-state voltage drop.

 

Important Points:

BJT

MOSFET

IGBT

Bipolar device

Unipolar device

Bipolar device, Three terminal device (emitter collector and gate)

Low input impedance

High input impedance

High input impedance

Current controlled device

Voltage controlled device

Voltage controlled device

Low on-state voltage drop and low conduction loss

High on-state voltage drop and higher conduction loss

Low forward voltage drop, low ON state power loss than MOSFET, low conduction loss than MOSFET

Secondary breakdown occurs

Free from the secondary breakdown

Secondary breakdown does not occur

Negative temperature coefficient

Positive temperature coefficient

Positive temperature coefficient

Not advisable for parallel operation

advisable for parallel operation

Used for parallel operation

Lower operating frequency(10kHz)

higher operating frequency(100kHz)

 

On state in the saturation region

On state in the ohmic region

 

Controlled turn on and turn off device

Control turn on and turn off device

Controlled turn on and turn off device

Turn on and turn off time depend on junction capacitance

Smaller turn off time

 

Controlled signal requirement continuously

Controlled signal requirement continuously

Controlled signal requirement continuously

Related Questions

Consider the following statements. 1. BJT is a current controlled device whereas IGBT is a voltage-controlled device. 2. BJT and IGBT have low input impedance whereas PMOSFET has higher input impedance. 3. IGBTs are available at higher voltage ratings than PMOSFETs because of increment in ON state voltage drop is less in IGBT. 4. IGBT and PMOSFETs have different substrate structures. The correct statements are
What is the printout of the following switch statement? char ch = 'a'; switch (ch){ case 'a': case 'A': System.out.print(ch); break; case 'b': case 'B': System.out.print(ch); break; case 'c': case 'C': System.out.print(ch); break; case 'd': case 'D': System.out.print(ch); }
What is the printout of the following switch statement?
char ch = 'a'; switch (ch){ case 'a': case 'A': System.out.print(ch); break; case 'b': case 'B': System.out.print(ch); break; case 'c': case 'C': System.out.print(ch); break; case 'd': case 'D': System.out.print(ch);}
From an alloy, two specimens are machined and tested separately under tension and compression. The engineering stress-strain curves as well as the true stress-true strain curves for tension and compression are plotted in the same diagram. Identify the correct statements:
P. The engineering stress-strain curves in tension and compression are identical.
Q. The true stress-true strain curve in compression is lower than the true stresstrue strain curve in tension due to Bauschinger effect.
R. The true stress-true strain curve in tension is above the corresponding engineering stress-strain, curve.
S. The true stress-true strain curve in tension and compression are identical.
Two processes X and Y need to access a critical section. Consider the following synchronization construct used by both the processes Process ? /* other code for process ? */ while(true) { varP = true; while(varQ == true) { /* Critical Section */ varP = false; } } /* other code for process ?? */   Process ? /* other code for process ? */ while(true) { varQ = true; while(varP == true) { /* Critical Section */ varQ = false; } } /* other code for process ? */   Here, varP and varQ are shared variables and both are initialized to false. Which one of the following statements is true?
Two statements are given, followed by three conclusions numbered I, II and III. Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements. Statements: All statements are answers. Some statements are questions. Conclusions: I. No question is a statement. II. Some answers are statements. III. Some questions are statements.
The logic problems in this set present you with three true statements: Fact 1, Fact 2 and Fact 3. Then you are given three more statements (labelled I, II, III), and you must determine which of these, if any, is also a fact. One or two of the statements could be true; or none of the statements could be true. Fact 1: Pictures can tell a story. Fact 2: All storybooks have pictures. Fact 3: Some storybooks have both words and pictures. If the first three statements are facts, which of the following statement/(s) must also be a fact? I. Pictures can tell a story better than words can. II. The stories in storybooks are very simple. III. Some storybooks have both words and pictures. Choose the correct answer from the options given below:
The logic problems in this set present you with three true statements: Fact 1, Fact 2 and Fact 3. Then you are given three more statements (labelled I, II, III), and you must determine which of these, if any, is also a fact. One or two of the statements could be true; or none of the statements could be true. Fact 1: Most stuffed toys are stuffed with beans. Fact 2: There are stuffed bears and stuffed tigers. Fact 3: Some chairs are stuffed with beans. If the fist three statements are facts, which of the following statement/(s) must also be a fact? I. Only children's chairs are stuffed with beans. II. All stuffed tigers are stuffed with beans. III. Stuffed monkeys are not stuffed with beans. Choose the correct answer from the options given below:
The logic problems in this set present you with three true statements: Fact 1, Fact 2 and Fact 3. Then you are given three more statements (labelled I, II, III), and you must determine which of these, if any, is also a fact. One or two of the statements could be true; or none of the statements could be true. Fact 1: All chickens are birds. Fact 2: Some chickens are hens. Fact 3: Female birds lay eggs. If the first three statements are facts, which of the following statement/(s) must also be a fact? I. All birds lay eggs. II. Hens are birds. III. Some chickens are not hens. Choose the correct answer from the options given below: 
The logic problems in this set present you with three true statements: Fact 1, Fact 2 and Fact 3. Then you are given three more statements (labelled I, II, III), and you must determine which of these, if any, is also a fact. One or two of the statements could be true; or none of the statements could be true. Fact 1: All hats have brims. Fact 2: There are black hats and blue hats. Fact 3: Baseball caps are hats. If the first three statements are facts, which of the following statement/(s) must also be a fact? I. All caps have brims. II. Some baseball caps are blue. III. Baseball caps have no brims. Choose the correct answer from the options given below: