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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
which obey ohms law
ANSWER: Not all potentiometers are linear some are made to follow a logarithm function some follows an exponential function. A linear potentiometer will have a linear curve.
Materials that obey Ohm's Law are called 'linear' or 'ohmic'; those that don't are called 'non-ohmic' or 'non-linear'.
What is a reference voltage of an adc?
The voltage at which the adc converts the signal.... it can also be called a limit of an ADC.
How High pass filter circuits works?
A High Pass Filter is an Electronic Filter that passes high frequency signals but Attenuates (reduces the Amplitude ) of Signals with frequencies lower than the cut-off Frequency
A Darlington pair is two transistors connected together to give a very high current gain.
What is deplition region in a semiconductor?
Depletion region: Consider a diode .It is a basic semiconductor.It has two regions .A cathode (Negative-N) and anode(Positiv-P) regions.The N and P when connected together forms a diode.A junction will be created at the intersection of N and p regions .N region has electrons(-ve charge) and P region has holes(+ve charge) .At the junction the electrons from N region and holes from P region will join together .Particular area at the junction will have no charged particles after that.This region is called depletion region. If we give a voltage of 0.7V ,the depletion region will decrease and there will be current flow in the device.That voltage is called thershold voltage.
What would life be without television?
Life would be better because there would not be to many crimes because people would not see violence things also people/kids would not be that fat because they would not want junk food that they see in the television ads.Family`s would also have more time together and kids would have time to study and read.
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A moot point about crime and diet. You do not have to be influenced deleteriously by the television at all. Crime was as common in 1912 as it is in 2012, albeit with some differences in offences.
More time to do other things> If you've the time to watch TV you have the time for hobbies - don't blame the TV for taking up your leisure time, for your viewing is entirely your own choice.
And my choice? Not to have a telly at all! And I can tell you life without it is sweet - and in the UK about £130 a year better-off! (Licence fee, which is the BBC subscription - and that's before you start adding extra subscription services like Sky.)
List out different telecom technologies?
Different standards depending on where you are at, but here in the United State some of the Telecom Circuit Types are as follows:
B1
DS0 (56K Channel)
DS1/T1 (European near equivalent is E1)
DS3/T3 (European near equivalent is E3)
SONET (OC1, OC-3, OC-12, OC-48, OC-192, OC-768) - (European near equivalent is SDH)
xPON (passive optical networking)
ACTIVE ETHERNET
BRI (Basic Rate Interface)
PRI (Primary Rate Interface)
Services that are provided on these can be any of the following:
ETHERNET
ISDN (PRI or BRI)
ADSL
SHDSL
E.SHDSL
HDSL
EOS (ETHERNET OVER SONET)
RPR (RESILIENT PACKET RING)
ATM (ASYNCHRONOUS TRANSFER MODE)
FRAME-RELAY
MPLS
GPON
EPON
GEPON
APON
SIP TRUNKING
Where do you put the multimeter leads when you test a Molex connector?
Put the black lead into any of the black connectors on the molex.
put the read lead into the yellow, or red lead on the molex.
The is in refrence to a NPN Prox Switch. These types of electrical sensors are widely used in various types of Manufacturing Facilities. Many of these types of manufactures are well known to the manufacturing community such as diect automation, rockwell automation, keyennce and omron to name a few.
NPN prox switches are known for there Neutral to positive sensing characteristics, thus having the output back to the controller a neutral based signal.
Answer
The D227 is a general purpouse NPN transistor and not realy critical, one of the following, is ideal replacements for the D227 transitor
BC337, BC635 and BC637
There is an error in the question, a NPN transistor's Collector is always connected to the positive of the supply and not the Emitter, an easy way to remember it "the collector, collect the current (stream of electrons) and emit it at the emitter". It is correct if the speaker is connected between the positive of the battery and the collector, although it can be connected between the emitter and the negative but for many reasons it is not good practice.
The resistance of a wire depends on the?
The length, cross-sectional area, and resistivity. As resistivity changes with temperature, temperature indirectly affects resistance.
What is high frequency tuned amplifier?
High frequency amplifier is a device which is tuned by high frequency. Tuned means the overlapping of generated frequency with that amplifier.
What is Drain punchthrough in MOSFET?
punch through is a condition in which the drain and source depletion regions merge together.The current flow in this case will not be under the control of gate voltage.It is significant in short channel devices.
What does NPN and PNP stand for in transistors?
A transistor is a three-terminal device consisting of 3 layers of semiconductor material. Two of them are one type of semiconductor and the third, a different type. For example, a PNP transistor consists of 2 layers of P-type semiconductor and a layer of N-type semiconductor between them. We can also have the NPN type transistor which has 2 layers of N-type semiconductor and a layer of P-type semiconductor between them. The three terminals are respectively referred to as emitter, base and collector. Transistors are widely used electronic components that perform the function of a switch or an amplifier.
The semiconductor material used in transistors is generally silicon, germanium or gallium arsenide. Impurities are added to them in order to create electrically positive (P) or electrically negative (N) behavior. When these layers are joined together the contact potential creates a potential barrier across the PN or NP junction. This potential barrier maintains electrons on the N side and holes on the P side.
NPN stands for negative positive negative PNP stands for positive negative positive. GALLIUM ARSENIDE is only used on LEDS manufacturing not transistors
ANSWER: NPN negative positive negative SUBSTRATE PNP is opposite of NPN
Why are exit lights burned out?
Generally Exit lights have very little ventilation and the bulbs are continuously heated and burn out faster. Some have vent holes but they want you to replace the bulbs which are costly after a while.
rotor is the moving/rotating part of a motor/generator
while stator is the stationary part.
What is the difference between a virtual channel and virtual path?
A virtual channel defines a single point to point connection, identified by its virtual channel identifier (VCI). A virtual path however, is a bundle of virtual channels that share the same end-point. Hence, a virtual path can be considered as a container that contains several virtual channels. Each virtual path is identified by its unique virtual path identifier (VPI). sridhara................
At this point in computer science we only have two 'digital' states, which is that any bit can only be either on or off. The on/off is commonly used to represent yes/no.(On(1) = Yes, Off(0) = No) A microprocessor can only see if a signal is there or is missing, in other words, if the signal is on or off, or a bit is a 1 or a 0.
Most practical envelope detectors use either half-wave or full-wave rectification of the signal to convert the AC audio input into a pulsed DC signal. Filtering is then used to smooth the final result. This filtering is rarely perfect and some "ripple" is likely to remain on the envelope follower output, particularly for low frequency inputs such as notes from a bass guitar. More filtering gives a smoother result, but decreases the responsiveness; thus, real-world designs must be optimized for the application.
An envelope detector is an electronic circuit that takes a high-frequency signal as input and provides an output which is the envelope of the original signal. The capacitor in the circuit stores up charge on the rising edge, and releases it slowly through the resistor when the signal falls. The diode in series rectifiesthe incoming signal, allowing current flow only when the positive input terminal is at a higher potential than the negative input terminal.
Why will an unloaded series-wound motor overspeed?
The Torque Speed characteristics of a series connected dc motor is such that at zero load the speed is "infinite"! ie it over runs and can burn out/explode! The characteristics are quite easy to derive from the basic equations of a dc motor but you can see them in most text books on electrical machines.
