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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 type of actuators are used in robotics?
There were many types of actuators that are used in robotics, some of which are hydraulic actuator, ultra-piezoelectric, pneumatic actuator and piezoelectric. The actuator is an electromechanical device that converts energy.
7 Please list all the dopant which is classified under n-type p-type?
- The p-type dopant elements are: boron, aluminum, gallium, and indium.
- The n-type dopant elements are: nitrogen, phosphorus, arsenic, and antimony.
What is the difference between AC machine and DC machine?
ac machines can run only in one direction but dc machines can run in both the directions depending upon the direction of current flow into it. If we change polarity of input supply we can reverse the direction of motion of dc machine
CommentThe above answer isn't altogether true, as it's very easy to change the direction of an AC machine. For example, to change the direction of rotation of a three-phase induction motor, the motor controller interchanges two of the three line conductors.
The main difference used to be that the speed of DC machines is easier to control, but that is a thing of the past thanks to developments in electronic motor controllers.
Load Shedding is the action taken to reduce the load on something. It mainly refers to the electricity supply in order to avoid too much load on a generating plant.
What the heck is the vz6. Zeners can protect overvoltags from damaging circuits. Two reversed zeners control AC currents.
A ghost image is one that you can look at. There are often ghost images that help people see what a puzzle should look like.
Why the carrier for the amplitude modulation must be a sinusoidal waveform?
The wave in amplitude modulation must be a sine wave. A sine wave represents smooth repetitive oscillation, which is necessary for this process.
making impedances identical.
when done between supply and load it is done to maximize power transfer.
when done on cables and busses it is done to prevent or minimize signal reflections. a low impedance mismatch reflects an inverted signal, a high impedance mismatch reflects an inphase signal.
What is intermediate frequency?
In communications and electronic engineering, an intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. [1] The intermediate frequency is created by mixing the carrier signal with a local oscillator signal in a process calledheterodyning, resulting in a signal at the difference or beat frequency. Intermediate frequencies are used in superheterodyne radio receivers, in which an incoming signal is shifted to an IF for amplification before final detection is done. The intermediate frequency stays the same for all signals, for example 455 kHz in an AM broadcast receiver.
Conversion to an intermediate frequency is useful for several reasons. When several stages of filters are used, they can all be set to a fixed frequency, which makes them easier to build and to tune. Lower frequency transistors generally have higher gains so fewer stages are required. It's easier to make sharply selective filters at lower fixed frequencies.
Precautions to take after a lightning storm?
There are many precautions you can take after a lightening storm. You could go out and seek immediate shelter for example.
What is the definition of m in m derived filters?
m in m derived filters refers to its association with the midpoint impedance
Standby current is the current that a device draws when it is not actively performing its function. This current would be measured in amperage, and commonly amperes, milliamperes or microamperes would be the units of measurement. As an example of a device drawing standby current; a radio transmitter may not be actively transmitting, but the power supply is turned on, and the transmitter is ready to operate. In this case, the transmitter is drawing very little power. A computer can be in standby mode and drawing "standby current" , examples of which are also "hibernation" and "sleep" modes. The computer display and hard disk drives are turned off, and the CPU is throttled down to low power state. However, memory is kept active, which requires just a small amount of battery power.
What are the correct steps to use a chassis punch?
First drill the pilot hole normally an 8mm put some oil on the die and mandrill, split the die and mandrill and insert the bolt with the die in the pilot hole insert the mandrill on the opposite side and screw the bolt until the hole is finished
Yes it can if it's connected in a push pull reconfiguration
What are major strengths and weakness of a teacher?
The strengths and weaknesses of teachers depend on the teacher. Some strengths of a teacher may be a good speaker, engaging, as well as patient. Some weaknesses of a teacher may be under-qualified, critical, and undedicated.
Higher immunity to noise, storage of digital signal is cheap and easy, its representation is only using two levels as opposed to infinite levels for analog
A look up table, is what it say, a list of data that is used in programing of micro controllers, it is a table that the program use to look up data that it need to do the job, it is a list of data and each data item is associated with a index, in other words where in the table it is, look at the examples at this link.
http://patenttrade.net/phpBB2/viewtopic.php?p=21#21
The human voice is a very mysterious entity because it cannot be directly seen as it is used. Unlike other musical instruments where the teacher can actually see what the student is doing, vocal training requires a teacher with an excellent ear that can identify the sounds a student produces with actual vocal function. I call this teaching ability, "x-ray ears"! For the student it is impossible to "hear" your own voice as others do. Therefore, it is helpful for the student of voice, whether they be a speaker or a singer to increase their understanding of exactly how this mysterious entity known as their "voice" actually works. Teaching voice should ideally be teaching the student to know his/her own voice well, what the options are and how to use them for a free and healthy sound.
Vocal production can seem like a complicated phenomenon, and therefore, I would like to break the voice down into the simplest components as possible. I will discuss what the voice is physically made up of, what variables it uses, and how the singer or speaker can use these variables and physical components in order to have vocal ease, strength and a pleasant vocal quality.
What is the human voice made of? Very simply- the muscles of the larynx, air, space and the articulators (tongue, teeth, palate, lips). That's it! These components interact with each other to produce your unique vocal sound. But you need to keep in mind that a vocalist uses the entire body to sing. This is why body alignment work is so important. Voice lessons, if taught by a competent teacher, should address each of these components through various exercises and concepts. It is also equally important to know which muscles and functions potentially interfere with the voice.
The muscle/mucous part of the voice is the vocal folds (aka vocal cords), which are a tiny paired muscle found in the larynx or voice box in your throat. The vocal cords are covered with a very important layer of mucous which basically has the consistency of jello. Other tiny muscles within the larynx control the space between the cords as well as the length of the cords. The vocal cords need to be brought together in order to produce sound. If they are too tightly brought together or not taut enough the vocal quality suffers. The larynx must be free to vibrate without excessive tensions from the throat constrictor muscles. Once they are brought together airflow makes them vibrate very quickly through the mucous layer that sits on them. If you are not getting enough water or are consuming products that dehydrate yourself, the vocal cords do not function freely. A symptom of this is a frequent need to clear your throat. I suggest 8 glasses of pure water or decaffeinated herbal tea per day. You should limit alcohol and caffeine consumption.
The voice is also made up of air. The air is the voice's energy source that you control with each breath that you take while singing or speaking. The air sets the vocal cords vibrating and oscillating through the mucous covering. Singing/speaking without a healthy air supply is like trying to drive a car without gas! Your breath is your fuel and it is vitally important. Vocalizing requires a sustained breath. When we inhale high in the body and raise our sternum/shoulder area for the breath, the exhalation cannot be sustained or controlled easily and actually tires the tiny throat muscles used for singing/speaking, producing vocal fatigue, tension and often, an airy sound.
On the other hand, learning how to take a breath which expands the ribcage and pelvic floor gives the vocalist ease and control over the voice once this technique is learned. A vocalist doesn't need more air, just more control over the air supply. One important fact that is almost always over-looked by voice teachers is how to prepare the body before taking a breath. It is almost impossible to take a healthy ribcage breath if your stomach muscles (the abdominals) are tense. The first step to proper breathing for voice, then, is to relax the abdominal area.
The voice is also most importantly made up of space.
Space? Let me explain. When you play any other musical instrument (and yes, even good speaking can be musical), that instrument is already built. You just simply learn to play it. The human voice is unique in that it is an instrument that is built as it is "played". The shape or space of this instrument is created by the size of your throat and mouth, other wise known as your "vocal tract". This is determined by how you take your breath, and the ability to relax those muscles that close the throat, many of which control swallowing and movements of the tongue. The shape of the voice is what makes it so mysterious, as it cannot be seen, only heard. When your throat is made smaller by the constrctor muscles, your larynx is elevated and the voice feels tight and strained. The sound produced is far from your best. If you employ the back of your tongue to push your larynx down in order to sing or speak, your voice will most likely sound and feel good to you. Unfortunately, no one but you will hear this pleasant sound. Your voice will not resonate to others as your primary resonator, your throat, will be filled up with your tongue! The goal of the vocalist then is to open the throat (as in a yawn) while relaxing the tongue. There are no muscles in the throat that help us to sing or speak with a resonant sound. Only the tiny muscles located in the larynx produce vibration and pitch which can be resonated by an open and totally relaxed throat.
What are the variables that a voice can work with? Pitch, head and chest registers, volume control, sounds (vowels and consonants), and vocal quality, depending on the style of music you are singing. Voice lessons will help you to become aware of these qualities and how to balance and manipulate them within your voice. Different vocal qualities and music usually bring up a wide gamut of strong emotions in the vocalist. It is important to recognize this- the voice is meant to be a communicative device closely connected to our spiritual selves. The more options the speaker or singer has available within their voice, the more they are able to express the gamut of human emotions. By expanding your voice, you expand yourself and the range of emotions you are able to express. This is the true goal of voice lessons.
One thing to remember is that learning to improve your voice is a gradual process. You are teaching your muscles new ways of responding. The process will become automatic, but it takes daily practice and often several years of study, depending on the student. Typically, at first you will be able to produce healthy changes during voice lessons. Gradually these improvements will carry-over into practice at home. The next step is getting so used to the new way of using your vocal and breathing muscles (while relaxing the constrictors) that this will become second nature to you during performances or in public speaking. Practice, dedication and good communication with a trusted voice teacher are the ingredients for success. You will get out of voice training exactly what you put into it. It's a wonderful journey of self-growth, exploration and exciting possibilities.
As power is defined as the rate of energy transfer, 'power dissipation' is a measure of the rate at which energy is dissipated, or lost, from an electrical system. When an electric current does work on a conductor, the internal energy of that conductor increases, causing its temperature to rise above the ambient (surrounding) temperature. This causes energy to dissipate away from the conductor into the surroundings, through the process of heat transfer. The rate of this heat transfer (joules per second) is termed 'power dissipation' (in watts).
This is power that is converted to heat and then conducted or radiated away from the device. Electronic and electric devices can have a limit on the current they can safely handle that is not an electronic limit, but a physical one. For instance, a transistor may otherwise be able to handle a certain amount of current, but it is given a lower current rating because the die gets too hot.
Dissipation is usually measured in watts, and uses the usual Ohm's law calculations for power:
P = I^2 * R
or
P = E * I
Electrical wiring in your house dissipates power, so does the speaker in your stereo, as well as motors, integrated circuits, anything that carries electrical current and has some inherent resistance (which is everything pretty much, except maybe superconductors!).
Power dissipation is usually an unwanted effect, unless you are trying to build an electric heater!
It is wasted power to keep the device quiescent and operational.
Are the pyramids of Egypt 3 sided or 4?
IF you count the base five, if not 4. I would know because i made a cardboard one and then i found out it was 4 so i had to startover. It sucked.And i thought it was three!
Radar jamming and deception is the intentional emission of radio frequency signals to interfere with the operation of a radar by saturating its receiver with noise or false information. Mechanical and electronic jamming are the two different types.
