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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

Why do you use modulation?

MODULATION is a media for transferring information it can come in many forms FM ,AM, PULSES, PAM and so forth.

How you get less then 1 ohms for your grounding system?

The same way you decrease the resistance of anything else ... by providing more parallel current paths. That means running more conductors, and increasing the surface area of contact between your ground system and the earth.

But let me ask you a couple of questions in return:

1). Since the lightning current already flowed through a couple thousand feet of air before it reached your house, do you really think it will notice whether you have 1 ohm or 2 ohms or 5 ohms in the rest of its path to ground ?

2). Aircraft have really good systems in place to protect their avionics and communications from lightning. What do you suppose is the resistance of their systems to ground when they're in flight ?

Just asking.

Maybe there are other things about the grounding system that are more important, and have a greater bearing on the quality of your protection, than a few DC ohms in the path.

Why input is voltage and output is current in fet?

The input is a Gate that is essentially infinite impedance, so no current. The output is essentially the resistance between Source and Drain, which controls the current flowing through it.

Is a standing fan open loop or close loop control system?

I assume a "standing fan" is just a fan that moves air. It might have a few settings such as oscillate or slow, medium, fast for the fan speed. This is an open loop control system. There is nothing telling a controller that the fan is oscillating or not, nor is there a mechanism that is telling the fan that it is on slow, medium or high.

If the fan were to have a temperature sensor on it that would apply power if the temp went above the preset limit, this could be described as a closed loop system.

Does an open circuit have a break that interrupts the flow of electrical charges?

Of course it has a break . open circuit means infinite resistance , so no electrical charge can flow through it .

How is a digital signal converted into an analog signal?

It is called modulation. The analog wave is modulated by a number of ways to represent digital data(signal).

These include phase changes, freq shifting, freq keying.

wherein a change in phase denotes a 0 or 1 .

There are more complex ways things are done to achieve the same effect with greater efficiecny.

To simply understand... the most basic of all is on - off keying. the analog signal is switched on or off to represent 0 or 1

What is the frequency of an EMP emitted from a high altitude nuclear explosion?

No single frequency, it is a wide bandwidth pulse that can contain frequencies well below the AM radio band into the high microwave band.

What are the applications of 0A79 diode?

0a79 ( germanium diode )in glass construction form is used in AM detector circuits.

What would be the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

To find the RMS voltage across a 50-ohm dummy load dissipating 1200 watts, you can use the formula ( P = \frac{V^2}{R} ), where ( P ) is power, ( V ) is voltage, and ( R ) is resistance. Rearranging the formula gives ( V = \sqrt{P \cdot R} ). Substituting the values, ( V = \sqrt{1200 , \text{W} \cdot 50 , \Omega} = \sqrt{60000} \approx 244.95 , \text{V} ). Thus, the RMS voltage across the load is approximately 245 volts.

Which is the best moving coil type instrument to convert sound to electricity?

IF you use speaker as microphone, you can use it as a transducer to convert soun energy into electrical signals

What is a thermal intermittent?

An intermittent is a type of problem with electronics equipment that doesn't occur all the time. Intermittent failures are among the toughest to troubleshoot. In this case, the failure is caused by overheating or other thermal changes. Sometimes you can guess at the cause, such as replacing the heat sink and/or fan, or at least applying new thermal paste. Other times, it would help to have coolant spray and see if that provokes the problem. If there is a crack in a circuit board and the temperature changes and causes it to conduct or separate, then replacing the board might be the only feasible option.

What is the ic configuration of and?

Presumably you'r asking the question: What does ic represent in Roman numerals? The lower case numerals for IC is ic, they both have the same numerical value and that is 99.

What is the technology used by satellite television?

Satellite television suppliers use a number of technologies, most all of which in some way relate to the electronics industry. The video signal is sent up and down in a digital format, and it is digitally encrypted on the uplink and decrypted by the downlink receiver on your end. All of this could be grouped under "computer science" as it's all digital. The electronics portions use electronics technology to make the thing work. Let's look a bit closer.

The signals on the uplink and downlink all operate on microwave frequencies. This is a "new and improved" version of radio signals (microwaves are like radio waves, only higher in frequency) that uses a dish of some sort as an antenna on the earthside ends. All kinds of electronics technology apply here. We also should mention the physics involved in putting the satellite up in space and parking it in orbit. Rockets and satellites operate because mechanical, aeronautical, electrical, electronic and chemical engineers make it happen. There are other engineering aspects included in this as well.

Why Bend loss in SMF not in MMF?

There should always be some type of bending loss in a fiber optic cable, whether it's a SMF or MMF cable. The reason for a bend loss being higher in SMF than MMF is that the core diameter of a SMF fiber can be significantly smaller than the core diameter of a MMF fiber, thus more of the light traveling down the SMF cable will hit the cladding at angles above the TIR angle, and more power will be lost.