Electronics Engineering

A variable capacitor is an electronic component that allows the capacitance to be adjusted or varied. It typically consists of two conductive plates separated by a dielectric material, with one plate being movable. By changing the distance between the plates or the effective area of overlap, the capacitance can be increased or decreased. Variable capacitors are commonly used in tuning circuits, such as radios, to adjust frequency response.

A slicer circuit is used to convert an analog signal into a digital signal by determining whether the input signal is above or below a certain threshold level. It effectively "slices" the waveform, producing a clean digital output that represents logical high or low states, which is essential for reliable data transmission and processing in digital systems. Slicer circuits are commonly employed in communication systems to improve signal integrity and reduce noise interference.

Yes, if there is a step up coil in the circuit. Coils can change voltage and amps in any given circuit. If the voltage is increased, than the amperage is decreased (or vice versa). This is how an ignition coil in a car works. A 14 volt auto electrical system can have 1000 volts across the spark plugs.

Without a coil, I know of no other way voltage in any part of a circuit can be higher than applied voltage. A 1000V? TRY 30 KV TO 40 KV @80-100MW

• wave
• cycle

Bandwidth is measured in bits eg Gigabits (Gb) Megabits Mb not to be confused with Gigabytes as in "how many Gigabytes of RAM/Hard Drive space does your computer have?"

When abbreviated gigabits is Gb (with the "b" as a lower case) vs. Gigabytes which uses a capital B in the abbreviation

The difference is important because there are 8 bits in a byte so mixing the two up tends to throw off one's calculations.

Anyways back to the topic on hand, there are MANY different types of fiber data cables with various bandwidths, such as ones you would find in a datacenter, some server setups, or connecting a number of switches in a large network.

4Gbit/sec & 8Gbit/sec are fairly commonplace though 10Gbit/sec is becoming more and more widely used.

there are also OC connections (from OC 1 or 2 or 12 all the way to OC -768 which is upwards of 38 Gbit/sec and generally only used as the backbone of large enterprise networks)

Then there are the cables that run under the ocean and connect continents (theres over 176 of these)

Now these cables have many, many individual fiber optic strands in them and have bandwidth of hundreds or thousands of Gbits/seccond

I also have some older 24 and 36 port switches kicking around that have 1 Gigabit fiber connectors, however that is the standard these days for desktop and laptop computers (for wired, not wifi) although thats using the copper wire Cat-5 or Cat-5 cables which are much cheaper so the 1Gbit fiber is obselete unless you're trying to use it for long distances, as fiber optic cables -transmitter depending- have much less attenuation (signal degridation) than copper and transmitter depending can go through cables that are several kilometers long without needing a repeater.

Hope this helps

digital imaging (using digital cameras and scanners), sound cards, and analog video-capturing devices sample, compress, and convert analog media into a series of 0s and 1s (digital) signals for processing by a computer

They are found to be deflected by electric and magnetic field in the specific direction in which a negatively charged particle would get deflected.

Yes. Digital signals have amplitude, as you do need to quantitatively specify the range of amplitudes that a signal must have to be considered in one state or the other. However, the actual amplitude is generally meaningless, so long as it is within the prescribed limits.

There is one electron in a hydrogen atom.

1/1 = 1ohm MR. volta [italian] Determined that it would take 1 volt to pass 1 amp trough a 1 ohm resistor MR ampere [ french] Ditermined that it would take 1 ohm and 1 volt to pass one ampere MR ohms [english] determinaed that for 1 volt and one ampere the resistance must be 1 ohm. mr watts determined that the product of volts x ampere will equal one watt [power]

This depends on what you are calling a "good student". My freshman class was 120+ people. My sophomore class was <60, my graduating class was 13. The people who graduated were NOT the smartest, they were the most dedicated, and the ones who were willing to work the hardest. THAT is what makes a good student. My senior year it was typical for me to have 12 hours of in class lecture, 30 hours of studying, and 20+ hours in the lab, and I was by no means exceptional. If you aren't willing to put in this sort of time, I would look for a different field.

I would start by narrowing the list to ABET accredited schools in your area. Beyond this, talk to teachers, and see what campus you like. Money comes into play, so in state schools are always a good starting point.

mini project is a self made ideal project by using any language.

They are essentially the same. You are using a capacitor to "short out" any AC while DC is unchanged.

A filter capacitor is used to filter line frequency and twice line frequency from a transformer rectifier combination.

A bypass cap is used on ICs and transistors to remove any high frequencies from a supply line as close to the IC or transistor pins as possible.

They are similar, but the bypass cap, while also removing line frequencies, also is used to remove higher frequency spikes from the supply that can cause ICs to malfunction. The spikes can come from other nearby ICs switching state, which causes transients in the supply line.

Bypass caps are usually 0.1µF 20 volts ceramic and are located as close as possible to the ICs, and you usually have one of these for each IC. Then you have one or a few larger caps, say 100µF 10 volt, per board. The 0.1µF ones remove the very high frequencies, and thus must be close to the ICs. The 100µF ones remove the lower frequencies.

But, you can call bypass caps "filter caps" if you want, there is a lot of overlap.

There are also "filter caps" that are used in low pass filters, so the terminology can be confusing.

Yes I did! in the early sixties. I remember going to the neighborhood grocery store in So. Cal. and my mother purchasing a pair for 13-15 cents in summertime for all us kids.

How are circuit And a river bed different

Zero. The sum of the voltage drops across all loads plus the voltage rises due to sources in a complete circuit must equal zero.

yes.i am learning the same so i need a related topics........

Tdm, fdm,

SIO is commonly used to describe a Serial Input / Output IC. Although there are many chips that have the same title, one of the more better known ones is the Zilog Z80 series SIO, one of the family of ICs used with the Z80 processor.

Although the chipset has been superseded by more powerful and smaller ICs such as the Microchip PICs and other micro-controllers, it is still available as a replacement part and can still be found in new designs.

The serial input and output function is now a relatively simple one and dedicated SIO chips have largely been replaced with integrated controllers and larger multi-function IO devices. Current SIO ICs offer far more than a simple serial port.

When it is required to increase the gain of a differential amplifier for that we have to increase the collector resistance to a large value which is difficult and also require larger chip area ,so instead we replace it by a constant current source that is a current mirror which is called an active load.

impedance of an inductor = j*w*l, where j = i = imaginary number, w = frequency in radians, l = inductance

2000 = j*w*(250 x 10-3)

remove 'j' for simplicity (unless you are doing more advance bode plots!)

2000 * 10^3 = w*250

w = 8000 radians

radians = 2*pi * frequency in hertz, if the answer must be in hertz.

train uses acpower as its source.as in case of dc there would be only steady state conditions and transmission distance would be low.but in ac,it is sinusoidal waveform and transmission of power source can be done at a larger rate with high effeciency and minimal lose.so ac source is used in electric trains.

38 kHz

Active power: Power that is actually consumed. If you, in the time domain, multiply voltage and current continuously (i.e. via oscilloscope), then take the time-average of the result, that is related to active power.

Reactive power: Power that is stored in components, then released again back to the source through the AC cycle. Capacitors and inductors both do this, just in opposite phase.

Apparent power: The peak voltage times the peak current (or the RMS voltage times the RMS current, depending on if you're looking at peak power or average power). A power supply must be capable of outputting the full apparent power delivered to a circuit, not just the active power.

A Doppler radar is a radar that uses a coherent transmitter pulse from a solid state transmitter system, rather than the incoherent pulse from a device such as a magnetron.

A coherent signal is a pure sine wave, therefore having a single frequency spectrum, rather than a cluster of frequencies.

The radar detects rain/wet snow etc in the normal way, by measuring it's Rayliegh backscatter coefficient. However, it can also detect rapid motion of raindrops by measuring the spectrum of the returned signal. The Doppler principal will cause frequency shifts in the signal that can be extracted by Fourier analysis. This allows the violence of the storm to be measured.