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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
What is half wave precision rectifier?
A device that converts full wave signal to half wave rectified dc signal. The device operates only for half of the input cycle during which the input signal is alllowed to pass and stops transmission of the signal for other half cycle. ok?
What is a semiconductor diode and their application?
It can be either a junction or point contact diode built with semiconductor material. there are many types depending on intended usage.
- junction diode is produced as described in its name by forming a junction in the semiconductor by using opposite types of dopant impurities.
- point contact diode is produced as described in its name by taking a semiconductor base and pressing a sharp metal point on its surface.
A few of the types of semiconductor diodes are: small signal, power rectifier, zener, tunnel, gunn, etc.
Why is the peak amplitude of voltage load lower than the amplitude of voltage transformer?
Unless otherwise stated, the value of an a.c. current or voltage is expressed in r.m.s. (root mean square) values which, for a sinusoidal waveform, is 0.707 times their peak value. The output of a voltage (or potential) transformer is no different, its measured voltage will be its r.m.s value which is lower than its peak value.
The current will drop. Y??
See it this way - resistance is something that opposes current flow. Voltage is the one that helps the current to get across the resistance. So if u have a high resistance, u need a high voltage to get the same current across.
But all the values are solely dependent on the output required.
Hope that helps.
Describe the relationship between voltage and current for the resistors?
R = V/I Therfore the resistance is proportional to the voltage and inversely proportional to the current.
What are signal conditioners used for?
Signal conditioners are used for a variety of purposes. They can be used as amplifiers, electrical isolators, exciters, and cold junction compensators.
Identify the characteristics of a digital System?
Knowledge
Digitization
Virtualization
Molecularization
Integration
Disentemedition
Convergence
Innovation
Presumption
Immediacy
Globalization
Discordance
What should be done with the unused inputs of a cmos integrated circuit?
tied high through a pullup resistor or grounded, never left open or they will pickup noise that may perturb other devices in the package that are used.
What arer the 3 legs of a transistor?
Emitter, Collector and Base
cutoff region, saturation region, and liner region
What happen if a light bulb burned out in a series circuit?
Physics
Believing that the universe can be explained with some finite amount of calculations and tables is a legitimate reason for sectioning under the Mental Health Act 2007.
Physics (either from the ancient Greek φύσις meaning "nature", or from Cockney rhyming slang "fizzy drinks" meaning "fizzy drinks") is a part of a rather giant delusional activity called "science". "Scientists" who partake in this activity believe that they are able to explain everything in the universe, possibly including life. Most of the time, these madmen-who call themselves "physicists" in particular-either continue "scientific inquiries" into the fundamental nature of matter, time, and space-often oblivious to the matter at hand, the time of their next dentist's appointment, or the clutter taking up their desk space-or teach other less specialised lunatics to do the same.
Contents- 1 The "scientific method"
- 1.1 Experiment versus theory
- 2 Brief history
- 2.1 Aristotle's Physics
- 2.2 Newtonian mechanics
- 2.3 Einstein's relativity
- 2.4 Quantum mechanics
- 3 A final unity?
- 4 See also
- Ask a question. However, the question cannot be one that is actually sensible or relevant. Rather than "When is the electricity billpayment due?" or "What happened last night?" or "Why am I trying to explain the fundamental forces and particles behind everything in the universe when I am left unable to even explain what happened last night?", the question must be one that asks for the reason behind a natural phenomenon. "What is the mechanism responsible for breaking the electroweak gauge symmetry, giving mass to the W and Z bosons?", for example, is a question sufficiently esoteric and unanswerable enough for the megalomaniacal scientist.
- Make further observations. Common sense is once again no help-simply observing "Perhaps I should go and write that cheque for the electricity bill rather than take part in an internationally funded experiment worth its weight in antimatter" satisfies not the eternally curious and curiously delusional mind of the physicist. Further explorations of the W and Z bosons as well as electroweak interactions is the path to take in this example.
- Form a hypothesis. A hypothesis here means a reasonable explanation for the physicist's observations. Such an explanation is much easier to craft than an explanation for what the physicist is doing, which is clearly inexplicable and delusional and not too late to undoyet. A typical scenario for the theoretical physicist. Experimentalists simply have not the sufficient funds to rip the universe a new space-time singularity at which all known laws of physics break down.
- Perform an experiment. At this point, the physicist is past the event horizon and already immersed in the delusion of being able to explain everything that happens around him. (The writer has taken the liberty of assuming the physicist to be male, since generally females are far too rational to go into physics-ed.) Therefore, he may as well go and do an experiment to see how wrong the hypothesis was about these bosons.
- See how wrong the hypothesis was. Obviously, the physicist is wrong. There is the off-chance that the hypothesis may have been right. In this case, fifteen minutes of fame will ensue before another physicist shows the hypothesis to have been wrong after all. The original physicist may still console himself with the fact that this other physicist will eventually himself be proven wrong as well.
- Adjust the hypothesis and try again. In everyday interactions with sensible people who do sensible things, this is called either "a correction" or even "changing your story". However, in the scientific community, it is termed "progress".
Therefore the world of physics is now split into experimentalists who perform experiments yet do not attempt to explain their results, and theorists who attempt to explain experiments that have not even been performed, largely because they involve bending and rending apart the space-time continuum and often in some apocalyptic manner. Nonetheless, to attempt to explain things without even observing them is quite a leap. To understand why such a split has developed, we must delve into the history of physics.
Brief historyThe history of physics is a series of theories, confirmation and vindication of said theories, widespread acceptance and praise and worship of said theories, and complete and total destruction of those theories.The periodic table of classical elements. Had Aristotle's idea been accepted up to modern times, chemistry would have been drastically simplified, as well as termed alchemy. Aristotle's PhysicsIn ancient Greece, one may safely say that Aristotle wrote the book on physics-indeed, wrote a book titled thePhysics (Greek: Φυσικῆς ἀκροάσεως, Latin: Physicae Auscultationes, Pig Latin: Ectureslay onway Aturenay) and made various other discoveries and arguments outside of this book. Aristotle chiefly concerned himself with the phenomenon of motion of objects, with these chief axioms:- All objects are composed of four elements. If correct, this would have meant that the weight of all objects were determined by the proportions of earth, water, wind, and fire, and would also have considerably simplified the Periodic Table. Under Aristotelian physics, the present issue of global warming would be explained by excessive fire and wind.
- Objects move towards their natural settling place. Most rocks have a natural place on the ground, which is why letting go of them from directly above your feet is a rather bad idea. It also explains the tremendous speed with which schoolchildren move towards their natural settling place in front of the telly.
- The speed of something falling is proportional to its weight. This is the reason for which Henry VIII's health failed dramatically quickly.
However, this system of pseudoscientific beliefs did not last very long-a mere two millennia or so. Eventually,Galileo Galilei (full name Galileu Galileo Galilei Galilee Galilea) proved that things did not fall at rates proportional to their weight by dropping two balls of different density off the Leaning Tower of Pisa which hit and killed a skinny man and an obese man whose heart rate fell at virtually the same rate. Galileo also went against Aristotle in claiming that objects would keep moving until some force resisted this motion. For instance, one may continue to move to reconsider until the chair presiding over the meeting denies him/her this.
Newtonian mechanicsEven the shred of credibility that Aristotelian physics had left was wholly destroyed by the work of delusional maniac Sir Isaac Newton. Chiefly known for his pursuit of alchemy, brief tenure as warden of the Royal Mint, and publications on analysis of scripture and predictions of theApocalypse, he also completely changed forever humankind's understanding of motion and gravity-but only somewhat completely.Sir Isaac Newton refuted the theory that 2012would mark the end of the world, saying that this, of course, would instead be 2060.Newton confirmed Galileo's principle of "inertia" (derived from the Latin word for lazy), and also postulated two more laws of motion from his own observations.
- The Second Law of Motion states that F = ma, where F is force, m is mass, and a is acceleration. Therefore this mathematical formula postulates that force is equal to "massacceleration", and that the unit of force is the kilogrammetres per second per second.
- The Third Law of Motion states that for every action there is a reaction equal in magnitude, opposite in direction, and unknown as to whether or not anyone should actually care about it.
In addition, he postulated that the force that drove objects to the surface of Earth was the same force as that which held the Moon in orbit of Earth. However, as if the concept of force at a distance were not enough to inhibit Newton, the mathematical tools that existed in his time were also inadequate for Newton's kinematical and dynamical needs. Therefore, he made maths up as he went along and called it "fluxions". Today, billions of schoolchildren worldwide suffer the consequence of Newton's mathematical trickery and subsequently run out of the classroom screaming. Most are still traumatised by the sight of the integral sign ∫ and unable to studyShakespeare in its original form due to the long s (ſ).
Newton also put forward a theory that light was composed of "corpuscles", i.e. particles of light. But his rival Robert Hooke, when he happened to not be fiddling with his Slinky toys or his dead plants, had put forward a wave theory of light. Somehow, a Scotsman named James Clerk Maxwell proved both of them wrong. According to Maxwell, light did not exist by itself, but rather was part of a unified field called the electromagnetic field. As its name implies, the electromagnetic field also included the superpowers Elektra and Magneto. This new electromagnetic theory was hailed as a crossover of the Daredevil and X-Men series and deemed revolutionary at the time. With Newtonian gravity and mechanics and Maxwell's equations of electromagnetism, many hoped that physics could finally predict everything in a "clockwork universe". In retrospect, this carries heavily ironic connotations since Newtonian mechanics would get nul points if that clockwork were running anywhere near the speed of light. Nonetheless, it seemed at the time that physics was at an end.
Einstein's relativityHowever, Maxwell's theory relied on an antiquated piece of physical science called the luminiferous aether. This theory posited that since electromagnetic waves clearly need a medium through which to travel, physicists could just make up a story about diethyl ether permeating the entire universe. Regardless to say, this was a poor excuse for a scientific theory and was just waiting to be disproven by an experiment, which it was. People finally realised that the speed of light was the same in all reference frames and media-or at least Albert Einstein did, since everyone else was far too surprised that humankind's understanding of the universe was still evolving.According to mass-energy equivalence, even a strand of Einstein's hair would carry explosive amounts of energy at the scale of several atomic bombs. Evidently, some of this energy already went into Einstein's disastrous haircut.Einstein also posited a series of incredibly outlandish proposals that allegedly resulted from his theory of special relativity:
- Mass-energy equivalence. Essentially, E = mc2. Nobody knows what mass-energy equivalence actually means beyond that equation.
- Invalidity of simultaneity. Two events that appear to happen at the same time from one person's point of view may not necessarily happen at the same time from another person's point of view. This means that whenever the narrator said "Meanwhile, somewhere else" and cut to another scene, he was lying.
- Motion faster than light is impossible. This result has led to countless professors using a tired old metaphor and describing the speed of light as a "universal speed limit". As a result, the Galactic Ministry of Hyperspace has repeatedly been forced to reassure citizens that the actual universal speed limit remains at 90 000 kph, and that piloting at the spaceship at the speed of light may endanger everyone on the hyperspace motorway.
These theories were surprisingly substantiated by prominent figures, including Planck, Minkowski, and the universe. Einstein, however, was less happy with his theory than nature was. In what may be one of the most self-defeating moves in the history of physics, Einsteincorrected his own theory, and replaced special relativity with general relativity, which saw gravity as a result of the bending of an elastic sheet. A good analogy is to the space-time continuum-in the same way that a heavy metal ball distorts the space-time continuum, so does a star bend an elastic sheet.
Quantum mechanicsHowever, Einstein never quite got around to explaining electromagnetism-being a hardcore DC Comics fan-or any of the nuclear forces, having taken up the fight against nuclear warfare. The nature of light, nuclear interactions and small-scale forces were thus left to others.The last major theories on light were Newton's theory of corpuscles and Hooke's wave theory of light, later Maxwell's theory of light as electromagnetic radiation in wave form. Somehow, Planck, Einstein, and de Broglie managed to prove all of them wrong-or, more accurately,possibly wrong. The end result of all of their research was that all of matter had properties of waves as well as those of particles. This would be a strange result of physics were it not for every single other thing quantum mechanics predicts.
In a move whose probability of being one of the most self-defeating moves ever in the history of physics is determined by the wave function , quantum physicists admitted that they were a little fuzzy on what happened at the smaller scales of physics research. Position and momentum of a subatomic particle could not both be ascertained with absolute precision; every particle has a range of possible positions and times described by a wave function that only collapses with an observer; and Erwin Schrödinger, realising just how utterly ridiculous this was, cracked a joke about a cat in a box that would continue for the next few centuries.
A final unity?Even today, despite the awesomeness of Richard Feynman having graced our world, we cannot explain gravity through some quantum mechanism. Quantum gravity that is compatible with general relativity would give us a unified vision of the world, and indeed-as these delusional maniacs believe-a complete and total explanation of everything that has happened, is happening, and will happen in the universe. Physics researchers would lose their jobs and-since they have no common sense-rejoice and celebrate. All would be explained by a single theory of the world after all.That is, until some lunatic proves it wrong.
See alsoFor those without comedic tastes, theso-called experts at Wikipedia have an article very remotely related tophysics.
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Featured ArticleFeatured version: 1 September 2010This article has been featured on the front page. - You can vote for or nominate your favourite articles at Uncyclopedia:VFH.
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What is the purpose of fixed resistor?
To lower the voltage and amperage in order to better fit the needs of other components.
Voltage, current, and resistance can be related by this formula. V = iR, where I is the current. Assuming that the voltage stays constant, current will decrease. Hope this helps!
It depends on what you mean by 'voltage'. For example, if you mean electromotive force (e.m.f.), then the internal resistance of a battery or generator will cause an internal voltage drop, resulting in the terminal voltage being lower than the open-circuit voltage and the greater the load, the lower the open-circuit voltage.
On the other hand, if you are asking 'how' do you reduce voltage, then there are various ways. For a.c. voltages, we can use a step-down transformer. For d.c. voltages, we can use a variable resistor connected as a potentiometer, or a pair of fixed-value resistors to form a voltage divider.
The question is meaningless. Voltage is a measure of electrical pressure, so it must be measured between two points.
In many systems, the chassis is used to complete the circuit by providing a return path. In most automotive or truck applications, this is the case. This saves materials cost by needing fewer wires.
In those systems, the voltage is measured between ground and the point of interest, but if there is a break in the path along the chassis, the results will be unreliable.
What is the maximum current of 2500kva transformer?
You need to know the Primary and secondary voltages to do the calculation.
we only have 100Kva transformers on our salt furnaces as an example:
100000va / 12v = 8333 amps the secondaries , wire, and electrodes are water cooled.
A mica capacitor is simply one that uses the mineral mica as the dielectric or insulator between plates.
What are the function of scale of analog multimeters?
hindi scale sa fish hinahanap namin ! basa basa nman . kaka bwiset
Bipolar junction transistors has two junctions base emitter junction, base collector junction. Accordingly there are four different regions of operation in which either of the two junctions are forward biased reverse biased or both. But the BJT can be effectively operated in there different modes according to the external bias voltage applied at each junction. i.e. Transistor in active region, saturation and cutoff. The other region of operation of BJT is called as inverse active region.
What are the five main component of oscilloscope?
1.3.3 Automatic sweep mode; 1.3.4 Recurrent sweeps; 1.3.5 Single sweeps ... The basic oscilloscope, as shown in the illustration, is typically divided into translucent windows in the panel to illuminate different parts of the sensitivity scale.
What is an electrostatic discharge and why does it occur?
A VERY BIG PROBLEM practically all electronics are restricted to voltages no greater 40 50 volts electrostatic can be as much as 5kv to 50 kv but the source impedance is very hi so while the voltage is there current capabilities are not a low impedance device can possibly survive these discharges but a hi impedance device like MOS cannot survive since the negligent current will raise the potential very hi blowing the device.
What is the formula average voltage of half wave rectifier?
Rectifier efficiency is the ratio of the DC output power to the AC input power.
efficiency (η)= P
dc
-----------
P
ac
for a full wave rectifier, η= 81.2%
~Amog
Is voltage measured in series?
ANSWER:Imagine that all the elements of a simple circuit (such as a battery, a light globe , a switch, and a resistor ) When the switch is closed , the electric current flows round and round the circuit just the same way as water would flow through these elements if the circuit had a Water pressure supply and a thin section of pipe and then a thick section of pipe etc . The FLOW of the electricity in Amps can be thought of as the same thing as the Flow rate of water in a pipe system. The Ammeter, is put into the circuit between any 2elements of the circuit, so that the current flows through it , as well as all the other elements (parts) of the circuit. When current flows through the various elements the flow rate (Current) is the same in all of them. As the current flows through, there is a drop of pressure (Voltage) as the electrons flow through each of the elements of the circuit. The actual pressure(volts) in each piece of the circuit , can be measured, by placing a Voltmeter across any individual item in the circuit. The drop in pressure at each item is measured by connecting each terminal of a Voltmeter across the item you are dealing with. The voltage across the 2terminals of the supply will be perhaps 12 Volt(a car battery) The volts ' pressure ' across the globe may be say 8 volt and the volts across the switch may be 3volts and the volts across the resistor may be only 1 volt. Always think of Ampere, as 'Flow Rate', and think of Voltage as ' Electric Pressure' If a circuit has a spot where it splits into 2 separate circuits , and then turns back into 1 piece of circuit, the current flowing as it goes into the 2 different passages, is split up, or shared between the 2 passages, and then the 2 separate currents join together again as they re-enter the single part of the circuit. To find out the current flow in each of the 2 parallel parts of the circuit you must place the Ammeter in series within each of the 2peices of circuit . The 2 separate curent readings will have a total equal to the current reading in the main single passage circuit.
Converts digital signals into analog signals for transmission over phone lines?
Oddly enough, it's called an A to D Converter and has many sources to obtain, including build it yourself plans or online auctions. There is also D to A converters so please be sure you pick the correct converter.
Why primary side of transformer blown?
It is either a short in (1 or more) of the windings (if its multi-phase) or the applied voltage was too high. What is the application, size (wattage), voltage, a number of phases for this Xfmr? I might be able to help you troubleshoot it further with this information.
AnswerIt depends on what you mean by 'blown'! Do you mean the primary fuse has operated? If so, then it's likely the transformer's load has exceeded the capacity of the transformer.
What happens when you remove one bulb from a series circuit?
Answer: it will burn out
**Explain:**The same current flows through each part of a series circuit. If the circuit is broken at any point there won't be any current that will flow. In this case, if one of the bulbs blew out, the other bulb would not be able to light up because the flow of electric current would have been interrupted.
#Carryonlearning
