Consider the following statements : 1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage. 2. In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage. 3. The voltage developed across the OFF switches of the full bridge converter is half the maximum dc link voltage. Which of the above statements are correct ?

1 Answer

Answer :

Consider the following statements : 1. The voltage developed across the OFF switches of the half bridge converter is the maximum dc link voltage. 2. In the full bridge converter, the voltage across the primary of the transformer is the dc link voltage. 3. The voltage developed across the OFF switches of the full bridge converter is half the maximum dc link voltage. Which of the above statements are correct ?


1 and 2 only

Related questions

Description : In a dc-ac 3-phase MOSFET bridge inverter circuit, the switches are marked in a sequence as 1, 2, 3 in the top-half and 4, 5, 6 in the bottom half of the bridge. The triggering sequence of switches that gives balanced output voltage is (A) 1 ... 3, 4, 2, 6 (C) 1, 6, 2, 4, 3, 5 (D) 1, 4, 2, 5, 3, 6

Last Answer : In a dc-ac 3-phase MOSFET bridge inverter circuit, the switches are marked in a sequence as 1, 2, 3 in the top-half and 4, 5, 6 in the bottom half of the bridge. The triggering sequence of switches that gives balanced output voltage is 1, 6, 2, 4, 3, 5

Description : A woman who lived in Germany during World War II wanted to cross the German/Swiss border in order to escape Nazi pursuers. The bridge which she is to cross is a half mile across, over a large canyon. ... , in which time the guard will see her crossing and shoot her. How does she get across? -Riddles

Last Answer : She waits until the guard is inside his hut, then walks halfway across before starting to walk back. The guard, seing she has no papers, sends her 'back'.

Description : A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse? Give a reason. -Riddles

Last Answer : No it does not collapse. Because it has driven a half mile - you would subtract the gas used from the total weight of the truck

Description : A large truck is crossing a bridge 1 mile long. The bridge can only hold 14000 lbs, which is the exact weight of the truck. The truck makes it half way across the bridge and stops. A bird lands on the truck. Does the bridge collapse? -Riddles

Last Answer : No, it does not collapse. Because it has driven a half mile - you would subtract the gas used from the total weight of the truck.

Description : The______electro mechanical switch (developed in 1938) had fewer moving parts than earlier switches. (A) No. 1ESS (B) Strowger (C) Step-by-step (D) Crossbar

Last Answer : (D) Crossbar

Description : The illustrated circuit is a wheatstone bridge. If the meter 'G' reads 0 with the switch closed then ________. EL-0024 A. the current through R1 - R2 is equal to the current through R3 - Rx B. the voltage ... of E C. the resistance of Rx is equal to the resistance of R2 D. all the above are true

Last Answer : Answer: A

Description : Consider three CPU intensive processes P1, P2, P3 which require 20, 10 and 30 units of time, arrive at times 1, 3 and 7 respectively. Suppose operating system is implementing Shortest Remaining Time first (preemptive scheduling) ... end of Ready queue are not counted). (A) 3 (B) 2 (C) 4 (D) 5

Last Answer : (A) 3

Description : Two 100 watt light bulbs are connected in parallel across a 100 volt power supply. The total power developed in the circuit is _______________. A. 200 watts B. 100 watts C. 50 watts D. equal to the product of the amperes times the voltage in each branch

Last Answer : Answer: A

Description : What causes a voltage to be developed across the secondary winding of a transformer?

Last Answer : The magnetic lines generated by the current in the primary cut

Description : In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor  A) Is always zero B) Can never be greater than the input voltage C) Can be greater than the input ... input voltage D) Can be greater than the input voltage, and is in phase with the input voltage

Last Answer : In a series RLC circuit at resonance, the magnitude of the voltage developed across the capacitor Can be greater than the input voltage, however, it is 90° out of phase with the input voltage 

Description : The illustrated device is a _______. EL-0064 A. full wave bridge rectifier B. half wave bridge rectifier C. solid state voltage regulator D. direct current (DC) filter

Last Answer : Answer: A

Description : The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to (a) lubricate the contacts (b) insulate the contacts from switch body (c) extinguish the arc (d) all of the above (e) none of the above

Last Answer : (c) extinguish the arc

Description : Motors, switches, voltage regulators, generators, etc., are a few examples of emi sources. What type of emi comes from these sources?

Last Answer : Man-made.

Last Answer : The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to extinguish the arc.

Description : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are ... vertically oriented structure supports large blocking voltages. Which of the above statements is/are correct ?

Last Answer : Consider the following statements with regard to power diodes : 1. The breakdown voltage is directly proportional to the doping density of the drift region. 2. Losses in the diode are less due to ... large blocking voltages. Which of the above statements is/are correct ? 2 only

Description : Walking home one day, you take a short cut along the train tracks. The tracks cross a narrow bridge over a deep gorge. At the point you are 3/8 of the way across the bridge, you hear the train whistle ... run over as well. If you can run ten miles per hour, how fast is the train moving? -Riddles

Last Answer : The train is moving at 40 miles per hour. Imagine that a friend is walking with you. When the train whistle blows, you head away from the train, he heads toward it. When he reaches safety, you ... the bridge in the time you cross the remaining 1/4, the train must be moving four times your speed.

Description : Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component? A. Wear rubber gloves and boots. B. Use only approved nonconducting ... the machine before beginning any repairs. D. Open the supply circuits and tag the switches.

Last Answer : Answer: D

Description : Which of the following statements accurately describe the differences between a hub and a switch? Check all that apply. A. A switch remembers which devices are connected on each interface, while a hub does not. B. A hub is a ... versions of switches. a. A,B b. A,B,C c. A,B,C,D d. A,C,D

Last Answer : b. A,B,C

Description : Which of the following statements is true regarding the illustrated circuit? El-0069 A. This full wave bridge should never be used aboard ship because the ground on lead 'A' will show on ... be direct current suitable for electronic circuits requiring voltage regulation. D. All the above are true.

Last Answer : Answer: B

Description : For practical purposes, in a simple series circuit, the source voltage will be dropped across one resistor if it has ______________. A. half the resistance of the other resistor B. a resistance equal to the other C. at least ten times the resistance of the other D. a partial short circuit

Last Answer : Answer: C

Description : In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is: (1) 30 V (2) 60 V (3) 15 V (4) 10 V

Last Answer : In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is: 60 V

Description : Consider the following statements regarding the satellite imaging: 1. The satellite orbit is fixed in the inertial space 2. During successive across-track imaging, the earth rotates beneath the sensor 3. The satellite images a skewed area ... ? (A) 1, 2, 3 (B) 1, 3 (C) 2, 3 (D) 1, 2

Last Answer : Answer: Option A

Description : Consider the following statements : 1. There is no flow across a streamline 2. Streamline spacing varies directly with velocity at the section 3. Streamlines do not cross 4. In steady flow, streamline pattern does not change with ... 4 (b) 1 and 2 only (c) 1, 3 and 4 only (d) 2, 3 and 4 only

Last Answer : (c) 1, 3 and 4 only

Description : Consider the following statements regarding the formation of P-N junctions: 1. Holes diffuse across the junction from P-side to N-side 2. The depletion layer is wiped out. 3. There is continuous flow of current across the junction 4 ... correct? (a) 1 and 3 (b) 2 and 3 (c) 1 and 4 (d) 2 and 4

Last Answer : Ans: (c) When a pn-junction is formed, there will be diffusion of carries across the junctions followed by recombination, and the creation of a depletion layer across which a ... potential is established, which will prevent further diffusion of carries across the junction, leading to equilibrium

Description : You are standing in front of a room with one lightbulb inside of it. You cannot see if it is on or off. Outside the room, there are 3 switches in the off positions. You may turn the ... to. You stop turning the switches, enter the room and know which switch controls the lightbulb. How? -Riddles

Last Answer : You turn 2 switches 'on' and leave 1 switch 'off' and wait about a minute. Then enter the room, but just before you enter, turn one switch from 'on' to 'off'. Once in the room, feel the lightbulb - ... switch left on. If it is cold and is off, it has to be the switch you left in the off position.

Description : there are 3 light bulbs in three seperate rooms. in front of you, there is a panel with 3 seperate switches. they only turn on or off. you may look inside each room only once. how can you tell which bulb belongs to which switch? -Riddles

Last Answer : you turn on any two switches, leave them for a few minutes, and turn one off. you enter each room only once. you know that the lightbulb that is lit beongs to the switch that was left on, the ... hot, belongs to the switch you turned off, and the cold bulb belongs to the switch you never touched.

Description : There are 100 light bulbs lined up in a row in a long room. Each bulb has its own switch and is currently switched off. The room has an entry door and an exit door. There are 100 people ... And how many of the light bulbs are illuminated after the 100th person has passed through the room? -Riddles

Last Answer : First think who will operate each bulb, obviously person #2 will do all the even numbers, and say person #10 will operate all the bulbs that end in a zero. So who would operate for example bulb 48: Persons numbered: 1 & 48 ... 100 (1, 4, 9, 16, 25, 36, 49, 64, 81 & 100) hence 10 bulbs remain on.

Description : There is a lamp inside a photography darkroom. When the darkroom door is closed, it is impossible to tell from outside the room whether or not the lamp is on. There are two switches outside the door of ... dark-room door one time, how can you tell which switches, if any, control the lamp? -Riddles

Last Answer : Turn the first switch on and leave it on for ten minutes. After ten minutes, turn that switch off and turn the second switch on. Open the darkroom door, and lightly (in case it is hot) touch the ... one controls the lamp. If the lamp is off, and the bulb is cool, neither switch controls the lamp.

Description : Positive control of induction is best described as a control system in which an operon functions (A) Unless it is switched off by a derepressed repressor protein (B) Only after a repressor protein is ... on (D) Only after an inducer protein, which is activated by an inducer, switch it on

Last Answer : Answer : D

Description : When the master switch for the winch shown in the illustration is in the 'off' position, and the line & safe switches are closed, which of the listed relays should be energized? EL-0102 A. 'DB' & '2T' B. 'DB' & '4M' C. 'FR-B.O.' & 'LV' D. '1M' & '1A'

Last Answer : Answer: C

Description : When a transmitter uses a high-power oscillator to produce the output pulse, what switches the oscillator on and off?

Last Answer : High-voltage pulse from the modulator.

Description : Why do computers use binary? A. Because It's all the understand.... B. Because a computer is a series of switches, 1 being on and 0 being off C. Because they can't understand ASCII D. Because UNICODE doesn't work

Last Answer : A. Because It's all the understand....

Description : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of the ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Last Answer : Consider the following statements with regard to a GTO : 1. The turn-off gain of the GTO is large. 2. Large negative gate current pulses are required to turn off the GTO. 3. GTO has large reverse blocking capability. Which of ... is/are correct ? (a) 1 only (b) 2 only (c) 3 only (d) 1, 2 and 3

Description : Which of the following statements is true concerning simple parallel resistance circuits? A. The total current flow equals the sum of the individual currents. B. The total current flow equals the ... resistance. D. The total voltage equals the sum of the individual voltages across each resistance.

Last Answer : Answer: A

Description : Which of the following statements concerning a simple parallel resistance circuit is correct? A. The voltage drop across each resistor is the same. B. The total current flow equals the reciprocal ... resistances. D. The total voltage equals the sum of the individual voltages across each resistance.

Last Answer : Answer: A

Description : Three capacitors with different capacitances are connected in series. Which of the following statements is TRUE? w) All three of the capacitors have the same potential difference between their plates. x ... y) The capacitance of the system depends on the voltage applied across the three capacitors.

Last Answer : ANSWER: X -- THE MAGNITUDE OF THE CHARGE IS THE SAME ON ALL OF THE CAPACITOR PLATES

Description : Consider the following statements: 1. Tamil Nadu is the only area which receives about half of its rainfall from north-east monsoon winds. 2. Kerala is the only state receiving very heavy rainfall from the south-west monsoon winds. 3. In India ... ] (a) 1, 2 and 3 (b) 1 and 2 (c) 1 and 3 (d) 2 and 3

Last Answer : Ans: (a)

Description : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Last Answer : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Description : Which one of the following statements is not correct? A Since voltage depends on concentrations, using standard conditions makes it easier to compare different electrochemical reactions. B We have ... half-reactions are determined by combining the relevant half-cell with a standardised half-cell.

Last Answer : C The direction of a redox reaction can only be determined experimentally. 

Description : Can i ride a bike across the tacony palmyra bridge?

Last Answer : i dont believe you can, no. i also dont believe you’d want to be on a bike on other end of that bridge.

Description : What is the name of the hotel across the pedestrian bridge from the Puerto Vallarta airport?

Last Answer : I have actually spend an hour now googeling, google mapping, browsing…I think I just need a bit more information to whereas this hotel is situated…Right after the bridge on the eastern side? (yeah I’m bored :))

Description : What's traffic like leaving SF across the Bay Bridge (heading east on 580) around 5pm on a weekday?

Last Answer : Awful. How far do you have to go on the 580?

Description : There are two cliffs. They are each attached by a suspension bridge that takes 5 minutes to walk across, and is the only way to get to the other side. No one is allowed to cross the bridge unless ... the bridge, he'll wake up exactly when you reach the other side, and send you back)? -Riddles

Last Answer : You can't go as he is awake, he'll see you, but go when he doesn't see you. Then, turn back as he is waking up, pretending to go to the side you came from. Then, he'll figure you are unauthorized to set foot on the bridge, and send you to the side you want to get to.

Description : In the early 1900's in England, there was two towns: town A and town B, and there was a huge river in between them. The only way across to each town was by a long bridge with a guard ... back. Many people have tried to cross but have always been caught, even very fast runners have only ab -Riddles

Last Answer : Did you get it? The answer is that they went up close to the guards tower, turned around and started walking back to the town they came from, the guard caught them and assumed that they came ... way and sent them back! Hope you enjoyed this, please subscribe and check back soon for more riddles!

Description : There was a fat man. He was being chased by zombies. The only way to get away was to cross a rope bridge. The rope bridge could only carry 80kg and the man was 79kg. The fat man had 2 things he needed to carry. Each weighed 1kg. How was he going to get across? -Riddles

Last Answer : Juggle the 2 things while getting across.

Description : A detachment of soldiers must cross a river. The bridge is broken, the river is deep. What to do?Suddenly the officer in charge spots two boys playing in a row boat by the shore. The boat is so ... two boys or one soldier.Still all the soldiers make it across the river in the boat. How? -Riddles

Last Answer : First the boys cross the river and 1 boy comes back and gets a soldier and keeps going back until all the soldiers have made it across safetly.