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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 are advantages and drawbacks of carry look ahead circuit?
uning of carry look ahead circuit they work to stop over flow and the addition perform well
How do you construct a simple electric circuit?
STEPS IN CONSTRUCTING A SIMPLE ELECTRIC CIRCUIT:
1.Prepare the materials.
2.Remove the bulb from the receptacle.
3.Unscrew the screw in the receptacle using a screw driver.
4.Extend the cord of a wire using pliers.
5.Connect the cords of the wire in between the loosen screw and the receptacle.
6.Put the bulb again on the receptacle.
7.Attach the cord at the end of both batteries.
State four types of LC oscillators?
Four types of LC oscillators include voltage controlled oscillators, drift control oscillators, crystal oscillators, and tuned circuit oscillators. A tuned circuit oscillator is the most common type of oscillator.
Is light emitting diodes emit visible light when forward biased?
It depends on the particular LED. Some of them emit infrared light. But, yes, emission occurs when forward-biased.
What is Use of monostable multivibrator?
A partial clue to the answer is in its name, Monostable. i.e. it has one stable state.
This is, in most monostables, a low, or "zero" state.
When a monostable receives a trigger, it produces one output pulse, the width (duration) of which is determined by the suitable choice of associated components.
Once the pulse has ended, the monostable returns to its stable state, ready to be triggered again.
The most common use is for 'de-bouncing' switch contacts.
Mechanical switches rarely make a clean contact first time. With modern high speed electronics, the 'crackle' from switch contacts can be detected as many separate presses of the switch. Follow the switch with a monostable and it will only detect one press over a short period of time.
Why GaAs is preferred to Si for high temperature operation of semi-conductor device?
GaAs has high mobility compare to Si
The first hunter-gatherer who pushed a stick into the ground and watched its shadow move with time might claim to be the inventor of the clock. But that was back in pre-history, before the development of written records or even permanent settlements.
Much later came the use of primitive clocks like the sundial and the water clock. But we are lucky to find examples of these from before 1500-2000 BC, and few carry any record of their designer or manufacturer.
So I'm afraid we shall never know the answer to your question. Specific types of clocks, possibly, when civilisations developed and records were kept
Can you replace 820 microfarads 6.3v capacitor with 1000 microfarads 6.3v capacitors?
usually yes. what is it being used for?
How do you repair GM DTC B0041 LF Deploymnet Loop Open?
Take it to a qualified auto technician to repair. You can accidentally set off a $800 airbag messing with these circuits if you don't know what you're doing.
What is the phenomenon of IR motion detection?
IR (infrared) detection uses the principle of thermal variation to detect a presence. Something warmer than the surrounding area will cause the detector to react to the presence of the heat source. If we add a second detector behind the Fresnel lens and "buck" the two detectors, their output will "cancel" when no thermal source moves in front of the lens. If a heat source moves in front of the lens, the detectors will react differently and their outputs will no longer cancel. This will result in an output that will trigger an alarm or an annunciator, or react in some way as the system is set up to do. The devices that do this are all off-the-shelf products, and they're fairly easy to install and use. INFRARED IS a frequency spectrum of a certain waveband the detector will sense the input and respond to it. has nothing to do with thermal sourcing area unless the source is in the same wave lenght
Some RFID tags emit electromagnetic radiation, which, unlike ionizing radiation (think nuclear bombs), is not deadly (or at least we think its not--the debate about cell phones and brain cancer rages on). However, some RFID tags only emit a signal when they are electromagnetically "stimuated" by an external source. Usually the source is some sort of electromagnet which, through induction, "powers up" the tag and allows it to send the required data.
Why the transistor is not used in switching 'AC voltage'?
The transistor is a "single direction current flow" device. Typically, for an NPN device, the collector must be more positive than the emitter for the device to bias on. You could use the transistor in an AC circult, but it would only conduct on half the cycle.
How do you calculate the current gain of a transistor?
Bipolar transistor current gain is also called "Beta," or the h-parameter "hfe."
beta = current_out / current_in
The beta of a BJT is mostly determined by the thickness of the Base region, and by the excess doping in the Emitter relative to the Base. A thin Base and a heavily-doped Emitter leads to a high value for current gain.
In a BJT, beta = Ic / Ib In a FET, beta is usually taken as infinity, since no current flows in or out of the gate. Beta is an impirical number. It means nothing unless the Ic is known or the load. It can have a beta from 1000 to 10 it all depends on the load.
What are the everyday applications of decoders encoders and multiplexers demultiplexers?
Multiplexer is a device that will select one input and put it through. De- multiplexers will take one signal and broadcast to many devices. Encoder will take a signal and code it with information specific to an application. Decoder will extract the encoded signal to restore in its original form
FPGA - Field Programmable Gate Array
A field-programmable gate array is a semiconductor device containing programmable logic components called "logic blocks", and programmable interconnects.
Describe at least one practical application that uses a multiplexer?
A: Suppose there is many points to measure and there is one voltmeter then a multiplexer will randomly access those points and measure it depending on the logical data input.
What is the heat produced by a 10 ohms resistor with a current of 1 ampere in a minute?
Heat=i^2*R*t=10*60=600 joules
Will a satellite dish work indoors?
A satellite dish works to receive signals and burn them up at its burn point,due to the high strength of the signals it can work in doors because the signals can penetrate through the walls,"BUT" this greatly reduces the signal strength hence leading to low efficiency,and since it also sends out signals, weak signals will be sent out due to the effect of the walls and some other impenetrable metallic materials like lead and other heavy metals with high relative molecular masses.
What predicts that the number of transistors inside a CPU will double every 18 months?
Moore's Law. And it's actually 12 months, now. But yes, the original theory was that the overall number of transistors on a CPU die would double every year and a half.
The correction to Moore's Law is influenced, among other things, also by the reduction in size of the dies and the transistors themselves.
