Electronics Engineering

There are more than two conditions that can make a thyristor conduct, but the general (functional) ones are:

1) positive voltage form anode to cathode, and

2) a positive voltage on the trigger input (referenced to the cathode) for a standard polarity thyristor.

Other conditions can be:

A) Anode-Cathode Voltage exceeding thyristor witholding voltage.

B) Overtemperature of the thyristor chip

C) Faulty thyristor (can be caused by overloads)

it is used to supply power to motherboard and other peripherals

Flux is used to keep metals from oxidizing. Solder will not bond well with copper-oxides which are formed when copper is exposed to high temperatures (ie a soldering iron) the flux prevents the oxidation. If you were to solder without flux the solder joint would be weak and possibly completely nonconductive.

The rule for voltage in a series circuit is that the signed sum of the voltage drops around the circuit add up to zero. This is Kirchoff's voltage law.

Take a simple circuit of a 1.5V battery and light bulb in series with each other. Starting at the battery negative terminal, the voltage from negative to positive is +1.5V. Starting at the top of the light bulb (the end connected to the battery positive terminal), the voltage from top to bottom is -1.5V. The two drops (rises, in this case), +1.5V and -1.5V add up to zero.

Note that the simple example above, is also a parallel circuit. The implication is that elements of a parallel circuit have the same voltage across them.

Lets add a second bulb in series with the first. The voltage going up across the battery is still +1.5V, while the voltage going down across each bulb is -0.75V. Again, the sum is zero.

You can take this to any level of complexity during circuit analysis. Find the series or parallel elements and calculate drops around the series part or find the equivalent voltages across the parallel parts, combine that with other techniques such as Kirchoff's current law, and Norton and Thevanin equivalents, and you can analyze any circuit.

ANSWER: In a series circuit since the current remains the same for every items the voltage will vary according to ohm law

The Fourier transform allows you to convert between time domain and frequency domain and back. Certain manipulations, such as filters, are easier to implement in the frequency domain, particularly when the representation is digital. You can also compress and shift the bandpass of a signal for easier transmission, and then convert it back at the receiving end.

a multimeter probably has a Ohm meter as well. If yes, use it and make sure you have the correct scale adjusted. If there is no Ohm meter you should calculate the resistance using Ohms Law. So if you use your multimeter as an Amp meter (in series with the unknown resistor) and you apply a know voltage across you should be able to calculate the resistance by dividing the voltage you applied by the current you meassured (R=v/I)

ANSWER: 1 make sure ther is no external power connected 2 short the leads together and adjust for zero reading on the meter. This step is necessary to eliminate the internal battery drifting with time.

Unlike voltage and amps reading the scaling of the meter is not important to begin with since a peg meter or a overflow will not destroy the meter immediately but do change the scale to get maximum deflection or digital display.That it

One way to increase the range of a walkie talkie is to increase the elevation of the set. Climbing a tree or a hill can increase the range significantly.

With the increase in temperature, the concentration of minority carriers starts increasing. Eventually, a temperature is reached called the critical temperature (85° C in case of germanium and 200° C in case of silicon) when the number of covalent bonds that are broken is very large and the number of holes is approximately equal to number of electrons. The extrinsic semiconductor now behaves essentially like an intrinsic semi-conductor.

coaxial cable

If two 1-ohm resistors are connected in parallel, their resistance is 0.5 ohms. If they are connected in series, their resistance is 2 ohms. It is not possible to connect only two resistors in series parallel.

Truth table of 'NOR' is 0 0 - 1 0 1 - 0 1 0 - 0 1 1 - 0 NOR is just opposite of OR as the name itself suggest NOR is the not of OR. Whole XOR is 1 for different outputs and 0 for same outputs.

1. By using transformer oils.
2. By nitrogen or sulfur hexaflouride gases.
3. By using flourinated hydrocarbons
4. Case is wide corrugated
5. Case is provided with radiators

CMRR stands for Common Mode Rejection Ratio, and it is a measure of how well the amplifier rejects signals that appear on both leads. The idea is that an amplifier should amplify the (Differential Mode) signal, but not any noise (Common Mode) that might appear on the lines, perhaps due to induction from nearby AC power sources. Since induction will show up on both leads, a high CMRR amplifier will have a greater signal to noise ratio overall

Because it is the top operating speed for that IC

In measuring high AC currents a current transformer with a suitable rating say 100/5 or 1000/5 are used. The secondary current is usually 5 amps when the fulload current of 100 or 1000 as the case may be is flowing in the mains. It is the univerasl practice to use CT's for measurement of AC currents. In DC circuits the transformer method will not work, so to increase the current that you can measure you can allow a known amount of current to bypass the ammeter and recalibrate the ammeter. In other words, put a shunt in parallel with the ammeter.

contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—from the cathode to the anode. Adding one or more control grids within the tube allows the current between the cathode and anode to be controlled by the voltage on the grids.[5]

discrete because the signal of an alarm is periodic.

If I am not wrong then you have asked about a transformer. And its a current transformer. By theory of voltage transformer we know that

Vs/Vp = Ns/Np

So for answering your question we need the value of number of turns in primary and secondary coil. But you can use this equation to find your answer if you have other values. By using ohmic law you can convert voltage to current.

Its 50-0.7=49.3V

Using this Formula :

PIV Rating = Vout - 0.7V

the three legs in a transistor are known as E B and C. They stand for Emitter, Base and collector.

Two of them are input and one is an output. so you have two going into the component and one that goes out.

hope this helps i am also doing an assignment on this and found this out.

It isn't.

If you print something on acid-free paper, it will be easily readable in 200 years.

A harddisk, on the other hand, rarely last longer than 5-10 years even under the best conditions. A CD or DVD may last 50 years, but no one knows for sure yet.

Even putting physical reliability aside, it is not at all obvious that the programs we use in a few hundred years will be able to read the data formats we use today.

Compare to punched cards: They were a primary digital storage medium as recently as 40-50 years ago, but you will be hard put to find a punched card reader for a computer bought today. And possibly even harder put to find software that knows what the data means, especially for binary data.

Digital technology has its big advantages in operating on data - whether summing or copying, the computer is much less likely to make errors than a human - and in searching. Finding anything specific among millions of printed pages can be a hopeless task, while searching the same volume of digital data is trivial.

Digital technology has several massive advantages, but storage reliability is not one of them.

The back to back connected zener diodes can be used as an AC regulator producing what is jokingly called a "poor man's square wave generator". Using this arrangement we can clip the waveform between a positive value of +8.2V and a negative value of -8.2V for a 7.5V zener diode. If we wanted to clip an output waveform between different minimum and maximum values for example, +8V and -6V, use would simply use two differently rated zener diodes.

http://www.electronics-tutorials.ws/diode/diode_7.html

Slope overload distorsion - is caused by use of step size delta which is too small to follow portions of waveform that has a steep slope.

Can be reduced by increasing the step size.

Granular noise - is caused by too large step size in signal parts with small slope. It can be reduced by decreasing the step size.

Electronsflow from areas of lower to higher voltage, while Current flow from areas higher to lower voltage.

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