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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 does Smt Before a name mean?
Smt is an abbreviation for Shrimati. It is a polite address for a lady, the equivalent of Shriman (or Shri) for a gentleman. In equal terms, it could be interpreted as the Indian "Mrs".
What is voltage stabilizer and what's it's control system circuit?
Voltage stabilizers are the circuits that are used to filter noise from the source voltage. DC voltage generated from a bridge network or diode network will contains voltage glitches. These glitches may cause serious problems to the operation of digital circuits. So a voltage regulator is used to filter these glitches. voltage stabilizer can be built using a voltage regulator ICs like 7805 for +5V, 7809 for +9V, 7905 for -5V, 7909 for -9V and so on.
What is the difference between filament current and tube current?
The current supplied to the filament for heating is defined as the Filament current.
whereas
When the filament is heated to a high temperature, the electrons are emitted. The flow of electrons form Cathode to anode is the tube Current.
What is base transport factor?
It is the fraction of minority carriers injected into the base of a BJT that successfully diffuse across the quasineutral width of the base and enter the collector. Ideally, it should be as close to 1 as possible, for maximum amplification. It is usually represented by alpha_T. alpha_T = I_C/I_E, where I_C is collector current, and I_E is emitter current. For an NPN transistor I_C and I_E are electron current, where as for a PNP they are hole currents.
Why you use 12mhz in 8051 micro controller?
Like many early microprocessors it has a 1mhz internal clock for its' operation. 12mhz is divided internally by 12 to derive this frequency.
What is a compensated semiconductor?
compensated semiconductor...
SEMICONDUCTORS WHICH CONTAIN BOTH DONOR AND ACCEPTOR DOPANT ATOMS IN SAME REGION IS CALLED COMPENSATED SEMICONDUCTOR.
It's an electronic component used to turn AC into DC. But it'won't be pure DC w/o some further processing. It is basically a semiconductor meaning will pass current one way only. Electrons will flow from positive to negative. Therefore Direct Current or DC as opposed to AC alternating current meaning positive and negative current flow. there is no such a thing as pure DC by adding a capacitor it can approach pure DC but mathematically speaking it is impossible to achieve.
commissioning...its inspecting a piece of equipment or plant to make sure you got what you paid for...i.e. the vendor build the correct thing...part of it is making sure it is safe to start up. This can be done by comparing the as built to the drawings.
A IR thermometer or Pyrometer is used where it is not possible to measure temperature with contact, IE very hot or very cold temperatures or where the object is a distance away. Infrared is in the 10-6 to 10-4 Meter band, this is called the thermal radiation band. It is between the microwave band and the visible light band. An IR thermometer, transmit a predefined IR frequency signal to the object under measurement, if the IR generated by that object itself is of a lower frequency than the received IR, that frequency is subtracted from the received frequency and that IR signal is then reflected back to the IR thermometer, this received signal is then used by the build in electronics of the thermometer to calculate the temperature of the object under measurement. Some uses: * Detecting clouds for remote telescope operation * Checking mechanical equipment or electrical circuit breaker boxes or outlets for hot spots * Checking heater or oven temperature, for calibration and control purposes * Detecting hot spots / performing diagnostics in electrical circuit board manufacturing * Checking for hot spots in fire fighting situations * Monitoring materials in process of heating and cooling, for research and development or manufacturing quality control situations
What is the advantages of 7400 series IC?
advantages over what? over 74HC Series? or 74LC Series? or CMOS 4000 series?
What are some applications of logic analyzer?
Many digital designs, including those of ICs, are simulated to detect defects before the unit is constructed. The simulation usually provides logic analysis displays. Often, complex discrete logic is verified by simulating inputs and testing outputs using boundary scan. Logic analyzers can uncover hardware defects that are not found in simulation. These problems are typically too difficult to model in simulation, or too time consuming to simulate and often cross multiple clock domains.
Field-programmable gate arrays have become a common measurement point for logic analyzers
Why is fiberglass a good insulator?
A: Glass is a very good insulator and fiber glass are just fibers of glass. VERY dangerous if inhaled because of it.
What Steps to take when selecting a suitable sampling frequency?
The Nyquist Theorem says that the sampling frequency should be twice the bandwidth to avoid aliasing. Thus if the bandwidth of the system is bw then the sampling frequency f=2*bw.
an impedance common to both input and output can be slit into two (input alone and output alone) by using miller theorem.at the i/p side impedance multiplied by 1-gain and output side it is done by 1-1/gain.
What is sag and swell of voltage?
Sag (dip) a decrease to between 0.1 and 0.9 pu in rms voltage or current at the power frequency for durations of 0.5 cycles to 1 minute. Swell - an increase to between 1.1 pu and 1.8 pu in rms voltage or current at the power frequency durations from 0.5 to 1 minute.
What are the advantages of screen-based communication?
The advantages of using screen-based communication is that a large number of people can watch the presentation for example, and receive information from it.
If u see the frequency response of an amplifier, initially the gain increases, then remains constant for some time and then decreases. If we draw a line 3dB below the contant frequency region we get two point , one at the increasing gain region and the other at the decreasing gain region. The frequency range between these two points respectively called as fl and fh is called midband frequency range.
Telestimulation systems are described for chronic indirect muscle stimulation in caged rabbits and mice. Both system use a 5 MHz carrier frequency transmission and consist of a transmitter and a receiver. The latter is fixed to the back of the animal.
THERE ARE NO FREQUENCY TO POWER CONVERSION rephrase the question
There is no such thing.
What there is is leakage current, which is the amount of undesired current flow in a branch of an actual circuit when that branch of the equivalent ideal circuit would have no current flow.
Leakage current can also be used to refer to current that occurs on a path where there is no intentional circuit branch (e.g. corona discharge current to the air in a high voltage system).
What are the application of Schmitt trigger?
The application of Schmitt Trigger is as follows:
1.squaring circuit
2.sine-to-square comparater
3.amplitude comparater
4. as flip flops
