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Why an inductor filter cannot be used in half wave rectifier?
I am not exactly sure why it is said it can't be used, I myslef was searching for an answer when I came across this, I have a general idea about this, why I would like to share. There can be two possible reasons. 1. The inductor produces a back-emf which opposes any change in current, but in the output of a HWR, the decrease in current and a no current state predominates a increase in current, so the inductor will naturally oppose a increase in current, which will mean a low dc voltage is obtained. [i.e. lower than the peak value] 2. The reactance of inductor increases with increase in frequency, the output frequency of a HWR is half that of a FWR. Thus filtering of higher harmonic waves is favoured. Please check this out as well. http://books.google.co.in/books?id=FEdLZZgCe6YC&pg=PA85&dq=%22inductor+filter%22+HWR+OR+Half-Wave-Rectifier&lr=&as_brr=3&ei=NlgkSZ3VApHakASXq92BBQ#PPA84,M2 Aghosh Babu Plamkandathil aghoshx(at)gmail.com
Compare between center tap rectifier and bridge rectifier?
Parameter HWR FVR FVBR 1 No. of Diodes 1 2 4 2 Need of Centre tapping in secondary of the transformer winding No Yes No 3 Average dc voltage Edc Em/π 2Em/π 2Em/π 4 Average d.c. current Idc Im/π 2Im/π 2Im/π 5 RMS value of Current IRMS Im/2 Im/ Im/ 6 Ripple Factor γ 1.21 0.48 0.48 7 Ripple Frequency f 2f 2f 8 Maximum Rectification Efficiency η 40.6 % 81.2 % 81.2 % 9 Average Diode Current Idc Idc/2 Idc/2 10 Form Factor 1.57 1.11 1.11 11 Filtering Difficult Easy Easy 12 Voltage Drop in Diode Less Less More 13 PIV Em 2Em Em 14 T.U.F. (TRANSFORMER UTILISATION FACTOR) 0.287 0.693 0.812 15 Applications Less In low In High voltage Voltage rectifiers rect.It depends on what you're doing and what you have available.If you can find a good center tapped transformer with the target voltage, that will save you 2 diodes.If you're going for the "quick and dirty" solution and you don't have a center tapped transformer, a bridge rectifier is an excellent way to get dirty DC.
What was the other name for Hathor?
Het-Hwr
How can keeping a food journal help a person manage his or hwr weight?
The book where food is keeped loser
Why an inductor filter cannot be used in half wave rectifier?
I am not exactly sure why it is said it can't be used, I myslef was searching for an answer when I came across this, I have a general idea about this, why I would like to share. There can be two possible reasons. 1. The inductor produces a back-emf which opposes any change in current, but in the output of a HWR, the decrease in current and a no current state predominates a increase in current, so the inductor will naturally oppose a increase in current, which will mean a low dc voltage is obtained. [i.e. lower than the peak value] 2. The reactance of inductor increases with increase in frequency, the output frequency of a HWR is half that of a FWR. Thus filtering of higher harmonic waves is favoured. Please check this out as well. http://books.google.co.in/books?id=FEdLZZgCe6YC&pg=PA85&dq=%22inductor+filter%22+HWR+OR+Half-Wave-Rectifier&lr=&as_brr=3&ei=NlgkSZ3VApHakASXq92BBQ#PPA84,M2 Aghosh Babu Plamkandathil aghoshx(at)gmail.com
How does rectification take place?
Type your answer her rectification takes place due to diode in rectifiers in a hwr only one diode presents it conducts during positive half and give dc out put. in fwr four (or) two diodes will presents based on type but the give both half cycles output ANSWER: A diode will pass an AC voltage trough only one way and refuse to pass the the other half of the AC signal. With just one diode the output will be the AC voltage minus the .7 v drop by the diode this output is called pulsating DC since it has no other component from the AC components in its output. It does no matter which side is rectified the + or the - the result will be either + or - pulsating DC.
Isotope of uranium used in nuclear reactors?
Uranium 235 is the most important isotope of uranium; it is a fissionable isotope used in HWR, PWR, BWR, research reactors and other types of reactors. But it is rare, only 0.72% of natural Uranium is this isotope.The more plentiful Uranium 238 isotope is only fertile not fissionable; it can only be used in fast reactors to breed Plutonium, which is fissionable. Isotopes of plutonium 239Pu and 241Pu are highly fissionable and importants for nuclear fuels.
What year was a enders royal service double barrel 12 gauge shotgun made with K R Winchell engraved under but plate?
Enders Royal Service shotguns were made by Cresent Fire Arms Co. for Shapleigh Hwr. Co. of St. Louis. Cresent Fire Arms was in business , I believe, fron the 1890's until the mid 1930's. All the records for this Co. have long since been either lost or destroyed. No idea what the K R Winchell stands for.
What does something has gone a-rye mean ... and is a-rye the correct phrase or spelling?
First it is "awry"it means "away from the correct or expected course"According to Merriam Webster: Pronunciation: \ə-ˈrī\Function: adverb or adjectiveDate: 14th century1 : in a turned or twisted position or direction : askew2 : off the correct or expected course :amiss----Second, you probably mean "haywire"it means "confusing"According to the Free Dictionary by Farlex: hay·wire (hwr)n.Wire used in baling hay.adj. Informal1. Mentally confused or erratic; crazy: went haywire over the interminable delays.2. Not functioning properly; broken.
Compare between center tap rectifier and bridge rectifier?
Parameter HWR FVR FVBR 1 No. of Diodes 1 2 4 2 Need of Centre tapping in secondary of the transformer winding No Yes No 3 Average dc voltage Edc Em/π 2Em/π 2Em/π 4 Average d.c. current Idc Im/π 2Im/π 2Im/π 5 RMS value of Current IRMS Im/2 Im/ Im/ 6 Ripple Factor γ 1.21 0.48 0.48 7 Ripple Frequency f 2f 2f 8 Maximum Rectification Efficiency η 40.6 % 81.2 % 81.2 % 9 Average Diode Current Idc Idc/2 Idc/2 10 Form Factor 1.57 1.11 1.11 11 Filtering Difficult Easy Easy 12 Voltage Drop in Diode Less Less More 13 PIV Em 2Em Em 14 T.U.F. (TRANSFORMER UTILISATION FACTOR) 0.287 0.693 0.812 15 Applications Less In low In High voltage Voltage rectifiers rect.It depends on what you're doing and what you have available.If you can find a good center tapped transformer with the target voltage, that will save you 2 diodes.If you're going for the "quick and dirty" solution and you don't have a center tapped transformer, a bridge rectifier is an excellent way to get dirty DC.
Explain the pros and cons of the Doppler moderator temperature coefficient and coolant void on pwr bwr hwr rmbkgcrlmfbr and msr?
You are asking a lot from Wiki answers. These are senior level nuclear engineering questions. PWR's and BWR's don't control on doppler and use it very little since what doppler does is affect the resonance capture of neutrons by plutonium as they are slowing down. PWR's don't rely on coolant void fraction since the steam voids are only transient on up power manuvers and don't exist steady state. BWR's do rely onthe void fraction to provide negative feedback and simplify control of the reactor. RBMK's do use doppler for control since they are primarily used to convert U238 to Plutonium. I am not familiar with the other reactor types you mentioned. For a better source of nuclear information I suggest that you visit the NIOF website (Nuclear Is Our Future) and follow the links.
What is working principle and construction of bridge rectifier?
A full wave bridge rectifier converts AC (Alternating Current) into DC (Direct Current) with an AC component. To achieve DC only, the output of the bridge rectifier must have the AC component removed by bypassing it, usually with capacitors. It consists of 4 diodes in a bridge format. During one half of an AC cycle, two of the diodes conduct and on the other half a cycle the other two conduct. Diodes allow current to flow in one direction only. A diagram can be found at http://www.allaboutcircuits.com/vol_6/chpt_5/5.html
Percent fissionable uranium 235 atoms in atom bombs and reactors?
A nuclear reactor works by using the energy that is released when the nucleus of a heavy atom splits. That process is called fission. In reactors, fission occurs when uranium atoms are hit by slow-moving neutrons. Absorbing these excess neutrons sometimes causes the atoms to break apart. As the nucleus splits, it releases energy, in the form of heat. In a boiling water reactor, this heat becomes steam, which drives turbines to generate the electricity that is used for everything from charging smartphones to heating homes. Uranium comes in two principle forms, or isotopes: uranium 235 and uranium 238. Uranium 238 is the most common uranium isotope, and more stable. When it absorbs a neutron, it usually doesn't break apart. Uranium 235 is more likely to undergo fission when hit by a slow-enough moving neutron. When hit, the nucleus absorbs the neutron, becomes unstable and decays, splits into two lighter atoms and throws out two or three new neutrons.
What is the recurrence rate of getting an eating disorder once you're cured?
Recurrence rates for eating disorders will vary from one person to the next so there are no hard and fast recurrence rates to give. Think of eating disorders and people who suffer with them as if they are snowflakes - there are no 2 alike. It's different for everyone although, there are ways to prevent recurrences.The first thing to do is seek out a medical doctor who specializes in checkup appointments for people with eating disorders. Make certain the doctor is someone that understands the need to stop the eating disorder cycle before it snowballs out of control. It is necessary to ensure a healthy weight and body structure along with blood work to make certain all the nutrients and vitamins needed for a healthy body are in place. It is important to be able to tell the medical doctor anything and feel comfortable in doing so. Eating disorders are like a timer on a bomb with a trigger. The sooner someone knows the bomb is active, the faster treatment can begin, and the lower hit the body will take.Think of eating disorders like alcoholism or substance abuse only without the 12-step program. It will never go away completely since it is always lurking in the background; however, this does not mean it cannot be controlled because it is most assuredly possible to control the problem.Most doctors who treat patients with eating disorders recommend and/or require patients to see a therapist who specializes in eating disorders. Often they refer patients to therapists (psychologists/psychiatrists) in order to help the patient best by finding the trigger that caused the eating disorder to manifest in the first place. There are 'tools' a therapist can teach patients to use when fighting eating disorders. In addition, therapists can help patients figure out what triggered the initial cause of the eating disorder along with any situations or problems that may trigger a recurrence, which will help avoid and/or use the proper "coping tools," to prevent going down that path again; it serves as a stop-gap. Again, eating disorders will always be a part of life for those with them but there is a difference when the eating disorder is in what we can refer to as a "dormant phase" of the disorder such as starving the body, binge and purge, and over-eating such as eating for comfort to fill a void in life. This 'dormant phase' is the time when the patient is in control, eating a healthy diet and maintaining a healthy lifestyle. Then there is the "active phase" of the disorder. This is when the patient with the eating disorder begins the starvation, binge/purging, and comfort eating. It is when everything in the patient's life is out of control except for the control over food. It's important with each 'active phase' to move back into the 'dormant phase' as quickly as possible because eating disorders can and often will lead to irreversible damage to the body and ultimately premature death. The sooner the disorder is under control, the safer the patient will be and that is where the therapist can provide that much-needed light in the tunnel to help get back on track again.Between the care of a doctor who can easily recognize the roller-coaster of eating disorder starting on the rail and making the patient aware of it and the tools a therapist can teach patients to use in order to get off that roller-coaster, the recurrence rates will go down considerably. However, there is one more thing that will help even more...Few people want to go to support meetings but finding or starting a support group for people with eating disorders will provide an even better chance of reducing the recurrence. Nobody wants to feel as if they are suffering alone. A support group with others who share the same battle every day puts an end to feeling alone and not having anyone who understands how a person with an eating disorder feels about themselves, life in general, and the embarrassment of having an eating disorder when there is no reason to feel embarrassed. Nobody on this planet has a perfect life with no problems. It is impossible - doesn't happen. Nobody is perfect. That is the beauty of a support group. A person can cry, stomp their feet, get angry, curse the disorder, or laugh and dance at having dodged a trigger and do so among those who understand exactly how exhausting, depressing, and even joyful times can be when dealing with such a problem - again, it's a safe zone that provides support from those who have "been there, done that, still fighting, & has enough tee-shirts to share with an entire state to have the continent!In rural areas where people are few and far between along with having people with eating disorders scattered all over the place, there is always the internet; hwr, I recommend an in-person approach first but if that is not a possibility, there are online support groups for people with eating disorders and these groups do work as long as the one with the disorder wants it to work.- I live each day w/the constant problems of four autoimmune diseases and the issues it causes with joint disease/damage, brittle bones, spinal damage, loss of sight, nerve damage, & other problems. The online support group I am with has been there for me more times than I can count and I have done the same for others on the group. It's helped me maintain my sanity.
