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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 the working of 3-axis MEMS accelerometer?
It is an arrangement of three mutually perpendicular Micro-Electro-Mechanical Systems accelerometers.
Who is a person who assigns more bandwidth to high-priority applications or users is a(n)?
network administrator
Orthogonal FDM is a method of passing digital data that uses multiple carriers. The basic idea is, you take a high-rate data stream, convert it into a number of low-rate data streams, put each of these streams on a slightly different frequency and dissemble all of it back into the high-rate stream at the distant end. A low-rate stream doesn't require as much bandwidth as a high-rate one does, so you can afford to use multiple frequencies without knocking everyone else off the air. Error correction schema are used to prevent losing data, and monitoring the atmosphere allows the radio to move channels around as necessary to ensure reliability. The reason you want to go through all this trouble is to be able to communicate when atmospherics turn bad. A similar technique is used in tropospheric-scatter radios, which bounce radio waves off part of the upper atmosphere; because the troposphere changes all the time, the only way to reliably communicate via it is to transmit the same data over several different frequencies at once. But in troposcatter, it's called diversity operation.
Minimum-shift keying is a form of frequency-shift keying, in which one frequency stands for a 1 - or 'mark' in teleprinter terms - and a different frequency for a 0, or space. This is a technique that's over a century old, and a century ago the way you did it was to wire a small capacitor in series with the contacts on an electromechanical relay, wire that assembly in parallel with the frequency-determining capacitor in your transmitter, and wire the relay's coil to your teleprinter. When the system needed to send a mark, the teleprinter closed the relay which changed the total capacitance of the LC tank which caused the radio's transmitting frequency to change. And they did it this way for at least seventy years! The problem with it (besides needing all those mechanical parts to get the thing to work, and the slow transmitting speeds it required; you certainly wouldn't be able to watch YouTube videos on your phone by keying an oscillator with a relay) is the technique created huge, bandwidth-eating sidebands that didn't matter when the only people sending FSK data were police departments and newspapers, but these days the only people NOT sending FSK data are babies too young to use phones, your grandma who refuses to buy a cell phone, and people in prison who aren't allowed to own cell phones. Today you couldn't get away with eating this much bandwidth, so "minimum-shift keying" - an FSK technique that creates very small sidebands - is the way to go, and feeding the signal through a gaussian filter to create gaussian MSK gives you a very reliable way to transmit data.
A good answer to put on your paper might be "OFDM uses multiple carriers and GMSK uses a single carrier."
What is the base voltage in a transformer circuit?
depends on the type of trans former.buck or boost.primary winding a secondary winding
What will be the output if you change the direction of diodes in bridge full wave rectifier?
The output will not change. Whichever side of the transformer is positive
at any instant still has 1/2 of the bridge to conduct through.
What is the current situation of jobs in electronics and communication branch in india?
There are many job opportunities in this field. You can search online for latest job vacancies.
What does it mean for an electrical circuit to have a short?
Shorts are usually a style of clothing that prevents one from exposing private areas otherwise unacceptable in a public setting. Electric shorts look much better when put on gradually or slowly. Another interpretation comes from short meaning small. When a circuit is in the beginning process, it is considered to be an "Electrical short circuit".
Its schotlky diode. schotlky diode is metal semi conducter junction. It has fast switchng speed. The cutting voltage of schotlky diode is about 0.2 volts.
good enough to conduct electricity in a fatal way yes! if you arebeing electricuted and you touch someone who is un earthed then they get instead - or at least the worst of it.
Watts is the product of amps x volts. To give an answer the amperage needs to be given.
As a battery ages and is used up what will the internal resistance be?
As it ages, its Kirchhoff virtual 'internal resistance' increases. Pictured this way, the practical effect is that the open-circuit voltage of a failing cell still measures good, but the voltage quickly sags when you try to draw any current from it
Will a DC motor actually produce voltage if it is spun in reverse?
It'll produce voltage if you spin it forwards, too. The only difference between a DC motor and a DC generator is what you use it for.
A long time ago, cars had DC generators on them instead of AC alternators. When you replaced a generator, you had to "polarize" it so it would make electricity. You hooked it up to your battery and let it run, as a motor, for a few seconds. Don't try that with an alternator because you'll break it.
If you're looking for a neat little elementary-school science project, you can use little Radio Shack electric motors as generators for things like windmills, water wheels, dynamos turned by bicycle tires...
Actually, yesA motor works by passing current through the conductors of an electromagnet (the rotor or armature) suspended in the magnetic field of a permanent magnet (or another electromagnet). The rotor is the moving part, that is, the part that spins. If instead of energizing the rotor's windings, you turned the rotor by hand, you would indeed induce a current in the rotor's windings. Basically you have created a generator.
Motors work on the basic principle of a current going through a conductor producing a magnetic field around the conductor. If you reverse that you have a magnetic field around a conductor which produces current.
What is the cost to convert a home to solar power?
The initial cost of solar power varies widely. It depends on how much electricity you use, how much Sun your home gets, and rebates in your area. Generally a typical home solar power system is about $30,000 after state and federal incentives. The system will pay for itself in about 10 years and last for 25-30 years. A solar power system connects to the electric meter so a homeowner uses electricity the same as they always have.
Answer
Solar energy can be perceived as an expensive option. However with advancing technologies and demand, prices are lowering rapidly and the long term savings are not to be ignored. Many local governments are also offering incentives for those who choose to go solar. This can alter the estimated cost and is a huge advantage.
The overall cost will vary depending on the size of your home, how much electricity you wish to use, the solar system you select and the amount of sunshine you receive.
For the average family, a solar power system will cost in the range of $12,000 to $26,000 before discounts. For more Information, see related links.
Answer from a customer:
I installed a system that is a wind / solar panel combination. The cost of this self installed system was about $24,000 after the rebates from the Government. I also installed high efficiency lights and any savings devices I could. I live in Wisconsin, so we see a tad less light then some areas, but then we do not have the heat issues that absolutely kill solar output performance. The system delivers enough power to light two 100 watt bulbs and a television for about three hours a day. Payback on the system is about 90 years unless I have any further problems. Two thunderstorms have taken $5K in inverters out so far in the first three years of operation. Getting on to my roof to shovel the panels is not worth the $0.23 a day in power I receive. I would never waste this money for such a poor operating system again. Solar never pays for itself.
Answer:
The cost of solar various depending on your need, for residential you can be spending as little as $30 a month or as much as a thousand+ a month. This is a vary big gap, being as such you can pay after rebates and federal tax as little as 5 grand for a system or as much as 300 grand depending on the size of the system to your needs. The big issue here is the payback, the average system pay back is about 7~ years, with a + or - or 3 depending on your local electric companies pay structure. Along with this solar panes are generally warrantied up to 25 years, but you can expect to see production from these panels 40+ years down the road. Average panel degrading at about .25% - .5% of a year. Inverters will need to be replaced about once every 15 years. As an example of a price if you're paying around $200 in southern California a month for electricity, you're looking at a system to offset to pay around 35 to 40 grand.
What does 3200-3 15c 11.1 v mean on a lipo battery?
3200 milliamp hour capacity
-3 (3 cells - sometimes listed as 3S)
15c means the battery can be discharged at 15 times the capacity (3.2 Ah x 15C = 48Amps)
11.1V - nominal voltage (this corresponds to 3 Lipo cells - 3.7 Volts per cell)
Is 0.01 Milli ampere is dangerous?
How high is the voltage that is being used? With high enough voltage any current is dangerous.
Which is better a doctor or a engineering?
Assuming that you are capable of becoming any one of them, you need to figure out which one would make you happier. If more money would make you happier, then "doctor" would be a better choice, under the above assumptions.
What are the functions of rheostat?
Rheostat is simply a variable resistor. i.e., typically 3 contacts, either end of resistive element and slider contact that moves along resistive element. So, in old radios would typically be used as a volume control.
AnswerA variable resistor may be used to control current, in which case it is called a rheostat. Or it may be used to control voltage, in which case it is called a potentiometer. In other words, the terms 'rheostat' and 'potentiometer' do not describe devices but, rather, they describe two applications of a variable resistor.
As a rheostat, the variable resistor is connected in series with a load, and two of its three terminals are used -one of the fixed terminal and the slider terminal.
As a potentiometer, the variable resistor is connected in parallel with a load, and each of its terminals are used. The two fixed terminals are connected across the supply, and one of the fixed terminals, together with the slider terminal, is connected across the load.
Antenna detect all frequency but why you can see only one channel?
A: The antenna is designed to receiver a specific band of frequency but the receiver will discriminate all signals except the one of interest otherwise all channels will fight for dominance
What are jumpers for on circuit boards?
Three reasons.
1...There are cases where you can't get there from here...there is no way to get a connection from a point to another point without jumping over another trace, so an insulated wire jumper is used.
2...Someone goofed up and a circuit correction must be made. This is done by cutting traces and adding jumpers. Sometimes ICs are "dead-bugged" (Glued on upside down) onto the circuit card.
3...Sometimes a circuit card must work while interfacing with different external circuits, so jumpers are added or removed to permit different interfaces.
Many times jumpers are supplied as zero ohm resistors (3 black rings) so that they can be installed by a pick-and-place machine.
How should an ammeter be placed in a circuit?
An ammeter should be placed in series, between the element you want to know the current of and the node the element was attached to before.
What instrument measures both ac and DC?
hot wire ammmeter or a moving iron ammeter will work for ac and dc.
What is short circuit ratio of an alternator?
Short circuit ratio is the ratio of field current required for the rated voltage at open circuit to the field current required for the rated armature current at short circuit
Why the name of op-amp ic 741?
An operational amplifier (op-amp) is a high-gain electronic voltage amplifier. The 741 IC type op-amp is a small scale integrated circuit.
There is no actual reason for it be called 741, the number is an arbitrary designator assigned simply to make it possible to identify the part and look it up in a databook. The number was originally assigned as a member of the 7xx series of SSI bipolar analog integrated circuits in the middle 1960s, 741 was probably just the next unassigned number available.
