What is mean by power switching devices?

1 Answer

Answer :

Power switching devices means like BJT, power MOSFET, SCR, TRIAC, GTO etc.

Related questions

Description : Explain the concept of initial and final conditions in switching for L and C.

Last Answer : i) Inductor: The current through an inductor cannot change instantly. If the inductor current is zero just before switching, then whatever may be the applied voltage, just after switching the inductor ... open-circuit.  The initial and final conditions are summarized in following table:

Description : Switching of a lamp in house produces noise in the radio. This is because switching operation produces?

Last Answer : Switching of a lamp in house produces noise in the radio. This is because switching operation produces arcs across separating contacts.

Description : What Are Input & Output Devices?

Last Answer : Answer :Keyboards, Floppy disk are the examples of input devices. Printer, LED / LCD display, CRT Monitor are the examples of output devices.

Description : What arc the errors occurring in measuring devices due to stray magnetic field and temp '? Explain how to compensate them.

Last Answer : 1. Error due to stray magnetic fields-   Main magnetic field gets disturbed by external magnetic fields known as stray magnetic fields.  2. Compensation technique   To avoid this error, ... resistance alloy having a negligible resistance temp coefficient in the ratio of 1:10 for pressure coil 

Description : What are the disadvantages of the linear regulator? how are they overcome in the switching regulator? What is continuous and discontinuous mode switching regulator?

Last Answer : Disadvantages of the linear regulator: Linear regulator waste power in the form of heat. Linear regulator has very low efficiency. Linear regulator cannot be used for the step ... between continuous mode and discontinuous mode switching regulator.

Description : Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.

Last Answer : Gate Turn Off Thyristor (GTO) Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal. But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off ... subdivided as storage period (Ts), fall period (Tp) and tail period (Tt).

Description : A waveguide termination having VSWR of 1.1 is used to dissipate 100 watts of power. The reflected power will be A) 0.2268 W B) 0.5868 W C) 0.3468 W D) 0.4568 W 

Last Answer : A waveguide termination having VSWR of 1.1 is used to dissipate 100 watts of power. The reflected power will be 0.2268 W

Description : The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is A) 50 W B) 66 W C) 68 W D) 70 W 

Last Answer : The total power of an AM transmitter having a carrier power of 50 W and the percentage of modulation at 80% is 66 W

Description : A snubber circuit is connected to the power semiconductor device to reduce the (A) turn-on time (B) turn-off time (C) electrical stresses (D) thermal resistance

Last Answer : A snubber circuit is connected to the power semiconductor device to reduce the electrical stresses

Description : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by (A) increasing the angular magnification of the telescope (B) increasing the period of the ... (C) decreasing the period of the grating (D) decreasing the slit-width of the collimator

Last Answer : The resolving power of a spectrometer consisting of collimator, a grating and a telescope can be increased by decreasing the period of the grating

Description : What are the types of power losses in inductor?

Last Answer : Copper losses, Eddy current loss, and hysteresis loss are the types of power losses in inductor.

Last Answer : MOSFET have high current losses due to High on state resistance. Hence MOSFET is used for low power applications.

Description : An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

Last Answer : An SSB transmitter produces a peak-to-peak voltage of 200 V across a 100 Ω antenna load. What is the Peak Envelope Power? A) 49.98 W B) 79.98 W C) 99.96 W D) 199.93 W

Description : Do you think the worst when the power is off?

Last Answer : Power is a big deal here, especially in winter. At various times power has been out for weeks and is very dangerous.

Description : Would a priority system for each households power help a power grid?

Last Answer : I’d make freezer and fridge number 1 and internet number 2. My bathroom has a window so it’s not as big of a deal.I also keep lots of LED flashlights handy just in case of power failure. Not perfect, but it works

Description : What is the priority for home power?

Last Answer : The unit is set to come on automatically when regular power is cut.

Description : Where is the nearest nuclear power station to where you live?

Last Answer : There are a few nearby. If a Fukushima like event happened I would have to leave permanently.

Description : When the truth becomes not "power", as the saying goes, but a burden, what do you do?

Last Answer : You denounce it as “fake news”.

Description : Is there an official Dragon Ball Power Level list on some websites?

Last Answer : I'd be surprised if there weren't a role-playing game that defines such. [Zaku Googles Dragon Ball Power Level RPG ... Oh, yep, there is. For example, here ] How official it is beyond that game, I don' ... 30,000,000 Android 18: 30,000,000 Android 19: 10,000,000 Android 20 (Dr. Gero): 10,000,000

Description : How much power can you be trusted with?

Last Answer : I went power mad as a night manager at a convenience store. Too much power. : ) I went slowly insane. It was a taste of true power. I don’t want that much responsibility and power ever again.

Description : Should some/all of Trump's power, as POTUS, be taken away until it is clear that he is not colluding with Russia? (DETAILS )

Last Answer : The policies he is enacting/wants to enact (killing scientific and medical research funding, destroying education, destroying environmental and consumer protection, rolling back women's rights, installing corporate ... circumstance to Putin, which is why the KGB guy helped the Orange on the throne.

Description : Do you think Trump is shocked about how little power he actually has as president, compared to when he was a private citizen?

Last Answer : answer:Yes, I do think it was a rude awakening. I also think that all those who attain the office probably suffer from the same feelings to some degree.

Description : Do anyone know of an online site where you can calculate usable power from a given sized solar cell?

Last Answer : Watt’s Law may hold the answer you seek. (W = Watts (power), I = Amps, E = volts) W = E x I, E = W/I, I = W/E. 746 Watts = 1 horsepower.

Description : Do the minions that prop up a dictator or czar, etc. want the perks of power a dictator has but not the authority?

Last Answer : answer:Generally, yes. That is why smart people avoid high office. I mean, in the comics, Lex Luthor considered being President of the United States a demotion compared to his overt power as CEO of LexCorp ... . Why make yourself a target when you can have all of the perks without most of the risks?

Description : What do you do in a power outage?

Last Answer : I play diablo 2… and drink water.

Description : What does it feel like to have absoulte power and control of your own life?

Last Answer : It’s a high no chemical, no herb, no fantasy can equal. To lose that place is a gut wrenching loss.

Description : How does "selling wind power" work?

Last Answer : Seems like the power company would have records of where they buy the power from. If it is a public company I would assume the information can be requested by the public to see what power s bought ... public, the thing that might vary is what percentage of wind power is purchased from week to week.

Description : What are some sources of unconventional nuclear power?

Last Answer : edited by me.

Description : May 18th is the 32nd anniversary of the eruption of Mt. St. Helens. Have you ever experienced or witnessed the awesome power of nature?

Last Answer : luckily the closest thing to that was when our above ground swimming pool blew a seam and water went everywhere. Still waiting for a tornado.

Description : If the power goes out, can you still run your gas appliances?

Last Answer : No.

Description : Do you have any interesting stories about the power going out?

Last Answer : Ice storm knocked out power to three states just before I moved to Seattle. I spent my last week in NH in the middle of the woods with no heat or water. That was an interesting week.

Description : What is the best way to power appliances during a long term power outage?

Last Answer : Generator. But, buy one in the “off-season” to get a better deal and buy one that is big enough to cover essentials in your home. The good people at Lowes will assist you and generally, they are the cheapest in town. Compare their price to WalMarts.

Description : What is the difference between power and authority?

Last Answer : answer:Authority has more of a connotation of being granted by a governing body or an electorate. Power can just be grabbed. So, someone might have the power to do something, but not the authority.

Description : How would you keep total power, if you had it, from corrupting you?

Last Answer : answer:we are already corrupt, and have somebody in our lives that really annoys us to tears. Or has taken advantage of a situation. I dont think I would be Medusa, but there are a few people that have been very nasty that need to be kicked in the shins.

Description : Is nuclear power a sustainable energy source?

Last Answer : Fission, no. Finite uranium resources. Fusion however, yes.

Description : My Toshiba Sattelite A205 power port is broken and I have no way of charging my laptop. Will a Toshiba Express Port Replicator be able to charge it?

Last Answer : The Satellite models that are listed as compatible with the Express Port Replicator are the following: R20, R25; Satellite Pro S300, S300M; Portege M400, M405, M700 and M750; Tecra A9, A10, M7, M9, M10 and R10 series portable computers. Since the A205 isn’t listed my guess is no.

Description : About usb hub connector... whay does this things have a power income?

Last Answer : a non feeded hub doesn’t supply the power needed to charge an iPod etc. it does however have the native power to feed data through, but without a feeded hub i wouldn’t be able to, for instance, charge 4 iPods at the same time

Description : How do you posses power over others?

Last Answer : I would believe if one wanted to posses power over others you would make them believe that they cannot do without you. You would listen and tell them what they wanted to hear and give them what ... and most of all know that our future will be more comfortable and our environment saver and cleaner.

Description : Why power plugs pins have small holes in the end?

Last Answer : I don’t know the answer but I would love too.

Description : Warning! This might be a noob question... Is it possible to increase the CPU/processing power on the iPhone with a 3rd party accessory of some kind?

Last Answer : You can’t alter hardware through software. Perhaps some sort of overclock is possible but that’s probably not recommended.

Description : My power button is stuck?Any ideas on how to fix it?

Last Answer : answer:lick it! Just kidding. Take it into an Apple store.

Description : What are power cables? Explain about them?

Last Answer : TYPES AND APPLICATIONS Presently PVC and XLPE cables are being used in electrical installations. The discussion is restricted to these two types only. The voltage ratings covered are up to and including ... short time overload up to 120°C and, In systems having higher short circuit levels.

Description : Indicate power of following electrical appliances?

Last Answer : Ans. Incandescent Lamp The incandescent lamp is the oldest electric light source still in general use.The incandescent lamp produces its light by the electrical heating of a wire (the filament ... The heat in the heating coil causes expansion in the thermostat which gradually disconnects the supply.

Description : What is meant by Power factor?

Last Answer : Ans. Power factor means ratio of true power to apparent power. It is cosine of phase angle between voltage and current. Its value is 1 for Unity P.F. Loads, 0 to 1 lagging for inductive loads and o to 1 leading for capacitive loads.

Description : What is BHP, How do you calculate the BHP of pump BHP-> Brake horse power?

Last Answer : Ans The following formula is used for calculating the BHP capacity of the pump. Q H/4500 = in horse power i.e., P = Discharge in Liters/minute H= Head in Meters


Last Answer : 1) MCB is used in circuits for Overload protection. True or False Ans True 2) We can improve the earth resistance by packing common salt charcoal & water. (True or False) Ans True 3) Silica gel used ... False 15) Shorting of power diode test to be conducted at full load. (True or false) Ans True

Description : Power Maintenance FILL IN THE BLANKS

Last Answer : 1) The process of removing heat from low temperature level and rejecting at high temperature is called. REFRIGERATION. 2) Any substances for change of its state at constant temperature absorbs/give up heat is ... ) The capacity of alternator, batteries & fans in TL coach are 4.5KW, 120Ah & 35W.

Description : Power Maintenance ABBREVIATIONS

Last Answer : 1 W - Watts 2 KW - Kilowatts 3 KWH - Kilowatt Hour 4 KVA - Kilo Volt Amps 5 KVAR - Kilo Volt Ampers Reactive 6 H.P. - Horse Power 7 A.H. - Ampere Hours 8 P.F. - Power Factor 9 R.P.M. - ... L.T.U.G - Low Tension Under Ground 36 P.V.C. - Poly Vinly Chloride 37 H.R.C. - High Rapturing Capacity

Description : Power Maintenance MCQ

Last Answer : 1) Turbine pumps are used up to a suction head of ( b ) a. 1000 ft. c. 20 ft b. 100 ft d. 50 ft 2) The yard stick for provision of Electrical points in staff quarters can be changed by the Zonal railways ... is used for electrical fire ( b ) a. Water c. Foam b. Co2 & dry powder d. None of the above

Description : Using Power Words

Last Answer : If you have been to a resume workshop, one of the buzzwords you've heard is power words. Power words are active words that grab the readers' attention and emphasize your role in ... inside sales department to increase customer satisfaction levels by 55% ? Sell yourself using these action words.