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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

Can you improve voltage level in the range of millivolt into a 15volt?

A voltage amplifier (high input and output impedances) with a gain

of 83.5 dB will amplify a signal of 1 millivolt to an output of 15 volts.

Two signals of 2GHz and 4GHz are frequency modulated on same carrier 10?

Definition: In FM technique, the frequency of the carrier signal changes according to the instantaneous amplitude of the modulating signal. Hence, the frequency of the modulating signal is of irrelevance here and the devition from "fc" will be dependent on the amplitude of the same. considering 2GHz and 4GHz to be digital signal the ratio would be 1:1.

What is unijunction tranjistor?

In unijunction transister there be a only one P-N Junction like diode, and current conduction takes place by either through holes or electrons.

What is the rank of BBD in India?

Not even in top 150 in present scenario.Don't go for ranking of UPTU colleges all are same category all are waste except all government colleges.UPTU gives u just the eligibility to do something better in future

Explain the working of master-slave JK flip flop?

A: A JK flip flop is called that since it has conditional inputs as J and K. For it to toggle many inputs must be present at the same time. It also can toggle during the rise or fall of the clock or state of the clock There are too many JK flip flops and their function to cover it all and explain the functions. For a design engineer it can choose any to do the work.

What does prefix 74 and 54 on a ttl of cmos ic indicate?

The 74 indicates a general use IC, the 54 indicates a military specification device with a greater operating temperature range. These two prefixes were originally assigned in the 1960s by Texas Instruments for their TTL logic family, but have since become de facto industry standards. They were also adopted for CMOS in the 1980s when it was decided that having common package pinouts would make it easier for both logic designers and circuit board layout software.

What law is used to find the polarity of resistor when two voltage source are connected?

Hi!

Well, it depends what voltage is "pushing" harder on the resistor. If you are ONLY dealing with 2 voltage sources and a single resistor, then the voltage source with the higher potential (or voltage) will dictate what polarity the resistor is.

Cheers!

How does computing valve work?

Just like the valves used in valve stereo equipment or old radios.

Except in computers (like the transistors in modern computers) valves are usually driven fully into saturation and cutoff, while in a valve stereo or old radio valves are usually operated as linear amplifiers with minimal distortion.

What is the operation of MAX233 IC?

this is connector chip used for asynchronous serial interface and its task is to make voltage level operative for next connected device.it is usually used in pc and microcontroller interface

When all the resistances in the circuit are of one ohm each then the equivalent resistance across the points A and B will be?

Resistors (R) in series are added by... Req = R1 + R2 + R3 + ... + Rn

In parallel... 1/Req = 1/R1 + 1/R2 + 1/R3 + ... + 1/Rn

or Req = 1/(1/R1 + 1/R2 + 1/R3 + ... + 1/Rn)

How many squares does a karnaugh map require for a three-variable boolean equation?

8, as you have 2^3 possibilities.

If you depict it in three dimensions, you have a cube of 2x2x2 = 8. However, this isn't useful to most people who find Karnaugh maps useful. To keep it two dimensional, we usually combine two of the variables. For example, if the variables were A, B, and C, one would write a 2x4 grid with A and A' (NOT A) on one axis, and BC, BC', B'C, B'C' on the other.

Can you use 8 ohm speakers on a 10 ohm radio?

Never haerd of a 10 ohm radio. There is no 10 ohm radio amplifier on the market, when you think that must be the output impedance of the amplifier. The output impedance of a radio amp is always less than 0.5 ohms. Scroll down to related links and go to "Voltage Bridging or impedance bridging - Zout < Zin"

Can you ruin a television by setting a magnet on it?

MagnetsUnfortunatley It can. D= My brother tried. :)

Yes that's right, he tried. The colours fade and everything goes all crap xD

P.S: Kids, don't try it at home D=

TV are electron emission from a cathode to the plate. Any magnetic flux can effect it. Actually to insure purity at turn on an AC flux is brought on the TV to insure no residual magnetics removal. This particular TV can be possibly be restored if A VERY STRONG AC magnet is slowly removed therefore removing the flux.

What are the steps performed by Demorgan's theorem?

DeMorgan's theorem can be simply be stated simply as "Break the line, and change the sign." Where line represents complement...

What is average value in alternate voltage?

The term is 'alternating voltage', not 'alternate voltage'. For an a.c. voltage or current, the average value is taken over half its wavelength because, over a complete wavelength it is, of course, zero. For a sine wave, the average value (over half a wavelength) is 0.637 Vmax or 0.637 Imax.

Can you eat phosphors?

Although I would not recommend it, yes you can as most are non-toxic.

If however you meant elemental Phosphorus instead of phosphors, NO, some form of Phosphorus are deadly poisons and white Phosphorus spontaneously ignites on contact with air!!!

If you don't know the difference between phosphors and Phosphorus, that is the subject of a different question.

Is oit possible to use three input in ic 7486?

If you look at the 7486 IC datasheet you can see, it have 4 independence XOR gates with 2 inputs. So you can only use 2 inputs if you see it like that.

But if you understand the truth table of XOR gate you can have 3 input application using 7486 IC. Here I will show you how.

1.Get the first 2 input into the first XOR gate.

2.Then get the 3rd input together with the Output from the first 2 input XOR gate into another gate.

3.This output should be the result of 3 input XOR gate.

Check this output with 3 input truth table to confirm the answer.

How do you set up a megger to test insulation resistance on self regulating heat tracing?

One lead will go on the braided shield (this is essentially the ground), the other lead goes on the heating conductors. Megger either one lead at a time, or both conductors under the same lead. I usually test at 1000v - follow manufacture's spec if unsure.

You cannot test line to line with a megger. Testing line to line with an ohmmeter is of some use, as the ohmic value will be dependent on the length, wattage and, to some degree, the temperature of the heat trace. This test is most useful with more than one run of identical heat trace, or to track one piece over time. Values far outside of what is expected will indicate damaged (open or shorted) heat trace.

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