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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
No, it is not expensive. In fact, it is the most cheapest way of creating electricity. If you are planning to want to have your own wind making system, I recommend you to make it by using wind power, or solar power, because it more accurate and it's cheaper than all the other ways of creating electricity.
What is the difference between pure sine wave and modified sine waves?
A pure sine wave has energy at only one frequency.
Any other wave shape has energy at other frequencies in addition to the frequency of the obvious waveshape.
If you add up enough sine waves with the right frtequencoies and amplitudes, they'll add up to form any shape
you want, even a squarewave.
How do you convert mega ohm to ohm?
Ohms are the SI unit of electrical impedance. Siemens are the unit of electrical conductance. Ohms are V/A while Siemens are A/V.
Take the reciprocal of one to get the other. 100 ohms is 1/100 or 0.01 S. 1 MS or 1,000,000 S is 0.000001 ohms, 1 micro ohm. 1 mS or 0.001 S is 1000 ohms.
What are functions of collector emitter and base of the transistor?
- emitter, emits minority carriers into the thin base material
- base, controls minority carrier current flow between the emitter and collector
- collector, collects minority carriers that have passed through the thin base material
While the emitter and collector are named for their electronic functions, the base is instead named for its structural function in the first point contact transistor: it was the bottom part of the transistor that structurally supported the other parts (thus the base). However junction transistors are usually not constructed that way, in most modern junction transistors the collector is the bottom part.
What is the Frequency of a Laser?
An electron beam has no inherent frequency.
It can be modulated by a signal that has a frequency.
The individual electrons in the beam will have a quantum frequency proportional to their energy,
However these are two different phenomena and it is not clear from your question which you are asking about.
What is the difference between oscillator and vibrators?
A violin's stings vibrate at a literally infinite number of frequencies, so that is a vibration.
Oscillations occur when vibrations, from several sources, all have the same or very, very, very similar frequencies combine and become enhanced.
What do you need to complete before the current will flow?
A circuit must have three basic components to make electricity flow.
1. Source of power or electricity.
2. Wires, switches and conductors through which the current can flow.
3. And finally a load to complete the circuit.
cause its bad,replace with higher wattage rating.too much current !!
A bandpass signal, xc(t), is a signal whose one-sided energy spectrum is both:
1) centered at a non-zero frequency, fC, and 2) does not extend in frequency to zero (DC).
The two sided transmission bandwidth of a signal is typically denoted by BT Hertz so that
the one-sided spectrum of the bandpass signal is zero except in [fC − BT /2,fC + BT /2]. This
implies that a bandpass signal satisfies the following constraint: BT /2 < fC. Fig. 1.1 shows a
typical bandpass spectrum. Since a bandpass signal, xc(t), is a physically realizable signal it is
real valued and consequently the energy spectrum will always be symmetric around f = 0. The
relative sizes of BT and fC are not important, only that the spectrum takes negligible values
around DC. In telephone modem communications this region of negligible spectral values is only
about 300Hz while in satellite communications it can be many Gigahertz.
What is the calibration of the pressure instrument?
A pressure gauge is attached to the proper fitting on a bench with valves and tubing. A known weight pressurizes a piston. That pressure goes to the gauge being calibrated and the N.B.S. certified gauge. The two are compared at several points called out in the test procedure. Adjustments are made to the mechanical linkage between the gauges internal tube and the indicator needle to make it read within an allowable percentage of deviance.
A stereo receiver uses a current of 2.2 amps from a 120 volt line?
The mathematical formula to solve this is P= I x R
In other owrds the amps x the voltage = watts.
2.2 amps x 120 volts = 264 watts
Can you have a radio signal underground?
Yes, you can however the distance that a signal may be travel depends on the power and frequency of the signal. For signals at the same power a lower frequency signal will travel further.
When current flows to all parts of a circuit the circuit is open?
No, when current flows to all parts of a circuit, the circuit is actually closed and complete. An open circuit is one where there is a break or interruption in the flow of current, preventing it from completing the full loop.
Why won't your soldering work?
A: The pad is not clean it has tarnish or wrong solder with not enough soldering flux. Finally not enough heat.
What are the rays in the cathode ray tubepositive or negative or neutral?
The rays produced in a cathode tube in early experiments were actually just streams of electrons. They had a negative charge, which was discovered by JJ Thomson when he placed a magnet next to his cathode ray tube and say the ray bend.
When capacitors are connected in parallel, you add up their capacitances to obtain the overall capacitance of that 'bank'. The main reason for using two capacitors in parallel when decoupling, is that they have a lower overall inductance (electrical resistance in essence) to one large capacitor, which improves the decoupling effect. Using two capacitors also provides better high-frequency filtering for the power bus. One minor advantage of this, is that, you can obtain a certain redundancy when using two smaller capacitors in parallel, instead of only one, as if one capacitor fails, the other still acts to decouple the circuit, to a certain extent. Source: http://www.cvel.clemson.edu/emc/tutorials/Decoupling/decoupling01.html (this article uses other sources to back up their statements)
Why are parallel circuits do used in the air conditioning industry?
In parallel wiring both headlamps get the power like two dogs pulling on separate leashes. That way, if one headlamp goes out the other still works. The other method of wiring, series, is like one dog's leash hooked to the collar of the other dog. If one leash (headlamp) breaks, both dogs quit pulling. It is a safety measure.
Max length for a digital coxial cable?
This depends on the signal and the type of cable. Standard definition digital video signals can be run for 1000 feet or more with low loss broadcast standard cable. HD is limited to around 400 feet with the same cable. However, there are always lower loss cables available to extend the maximum distance.
In the home, co-ax cables are often good for in excess of 100 feet although it depends very much on the signal source, the receiver and the cable itself.
Requirements to become an engineer vary in each country. In the United States, ABET (Accreditation Board of Engineering Technology)is a non profit organization that accredits United States postsecondary degree programs in applied science, computing, engineering, and technology to qualify universities for their degrees. To meet ABETs requirements, students need to fulfill the determined class work qualifying the graduate title of engineer. These classes are prominently heavy in physics, math, chemistry, biology. Once the student enters his junior year, he/she will declare a specific degree (electrical, mechanical, etc) which will focus specific classes pertaining to that field of study. Many companies will not consider degrees if their university was not ABET accredited.
To provide engineering to the public (construction, power grid, etc) some countries require a Professional Engineering license in which the graduate will have to sit first for the EIT (Engineering In Training) exam and then, 3 years later, can sit for the PE (Professional Engineer) exam.
In the US, there is no restriction who can claim the title of engineer, i.e. train engineer, maintenence engineer, Information Technology Engineer regardless of the above education. Though in Canada, it is illegal to claim title of engineer without their accrediation of education.
Why NPN transistor are preffered?
You need a positive input to operate the transistor and since most circuits are negatively grounded when the transistor is not in use it has a negative input current thus using less power most of the time.
How do you identify that capacitor is as Electrolytic capacitor?
Electrolytic capacitors look like little batteries. Any capacitor that looks like this will be electrolytic.
Another Answer
Electrolytic capacitors are polarised, so their terminals are marked with positive and negative symbols.
- bipolar devices use both majority and minority current carriers
- unipolar devices use only majority current carriers
