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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
Does a sub-woofer contains motor in it?
No.
_________________________
A 'motor' is the section of a speaker that drives the cone. This section consists of the spider, the voice coil and the magnet.
How do the parasitic capacitance limit the high frequency operation of an integrated circuit?
Parasitic capacitance is the inherent capacitance between different planes of metal in a circuit. The main problem is that capacitors look like shorts to high frequencies, which can then simulate grounding shorts, line linkage, feedback paths and other generally undesirable features in the circuit. In particular, in ICs, the problem is 'crosstalk', wherein signals in one part of the IC induce a signal through capacitive coupling in another part of the circuit.
How the noise is overcome with the help of positive feedback amplifier?
A: With positive feedback the amplifier is saturated one way or the other in a quiescent state no signal or noise input can effects its output
What is the difference between am raido and FM radio?
A: AM radio is an Amplitude Modulation transmission . Meaning it has fix frequency but it is modulated by the signal.
FM Frequency Modulation the frequency is modulated by the signal
An advantage of having household circuits in parallel is that?
If they were in series you would have no power every time a tool or light bulb broke down
What is the maximum current value that can be measured with an analog VOM?
Unfortunately that varies with the model of VOM, consult the users manual.
differentiator is used in t.v.
Name a few electronics companies in India?
i donot think there is any there may be some local chip designing companies in Bangalore and hydrabad
I own one of these facsimiles, so if you have one there are at least two. Any idea how much they are worth?
What kind of gate does the porter imagine he is tending?
The Porter imagines he is tending the Gates of Hell.
charge flows from high potential energy to low potential energy.Particle falls from high potential to low potential during free fall of particle. asok
Are there different ways to achieve the same results using different logic gate combanations?
Obviously
How are thermistors used in computer fans?
Thermistors change their properties with temperature, so they can be used to run a fan only when it's hot.
Parallel operation of single phase transformer?
It is required to connect a second transformer in parallel with the first transformer if the load exceeds the rating of the transformer shown in Figure 1.46. The primary windings are connected to the supply bus bars while the secondary windings are connected to the load bus bars. During paralleling of the transformer, similar polarities of the transformers should be connected to the same bus bars shown in Figure 1.46. Otherwise, the two emfs induced in the secondary windings with incorrect polarities will produce the equivalent of a dead short circuit shown in Figure 1.47.
The following conditions are important for parallel opera-tion of transformers:
- The voltage ratings of both the primary and the secondary of the transformers should be identical. Small differences are permissible if the resultant circulating currents can be tolerated.
- The connections of the transformers should be proper with respect to their polarities.
- The percentage impedances should be equal in magnitude and the X/R ratio must be the same to avoid circulating current and operation at different power factors.
- The equivalent impedances must be inversely proportional to the respective kVA ratings.
The above conditions must be satisfied by paralleling transformers of identical ratings of the same make/model. With different kVA ratings of even the same make/model, the effects in steps 1, 2 and 3 may appear in undesirable amounts. Step 2 must be carried out satisfactorily even if steps 1, 3 and 4 are slightly modified.
Figure 1.46 Parallel Operation of Transformers
Figure 1.47 Parallel Operation of Transformers with Incorrect Polarities
by keshav basyal
pokharauniversity
pokhara nepal
Can a wireless router work without a modem?
It depends on what you are using it for. I am using one with no modem to connect to my printer.
Where can you find an operator manual for a Peavey MD-12 mixer?
http://www.peavey.com/search.cfm?c=0&term=md
bottom of the page
What is wide dynamic range in digital communication system?
ratio of the strongest transmittable signal to weakest discernible signal
Who is the first inventor of the ecg machine?
Willem Einthoven Invented the accurate ECG using Strings Galvonometer, but Alexander Muirhead made the first prototype.
A simple high range object detection infrared sensor schematic?
the circuit diagram can be found at www.ikalogic.com! it is an awesome site
How can you generate a 2khz clock?
You need a timer like the LM555. while the device is stable the external components usually are not . So for a stable clock the components must be stable temperature wise.
What can you do to fix a circuit which is burned out in a load center?
If the circuit has not damaged the bus bars in the distribution panel just change the breaker out for a new one. If the wire insulation has burned you might want to think about changing the wire for a new one. Wire burn back is caused by loose terminal connections at the breaker. As a general maintenance procedure shut off the main breaker and go over all of the breaker terminal connections to make sure that they are tight.
hey!! let's see how we can figure this out, cool?!
let's label some things first.
Vbattery = 23.7 V
R1 = 22.7 ohms
R2 = 39.3 ohms
R3 = 6.70 ohms
here's a little diagram..
GND-------[- Vbattery +]-----------[ R1 ]-------[ R2 ] -------[ R3 ]-----------GND
current, I, will be flowing through this circuit.
but which way?
current flows out of the + part of the battery.
so real fast, let's add something to the diagram, cool?
I
------------>
GND-------[- Vbattery +]-----------[ R1 ]-------[ R2 ] -------[ R3 ]-----------GND
I
<------------
all the elements are in series, will there be a constant current or constant voltage?!
you're right !! there's a different voltage drop at each resistor, so the current must be the same throughout the entire circuit. i kept drawing the voltage drops, but the picture is busted when saved. =(
k, let's ask that dead guy, mr. ohms, for his equation.. k, cool, it's V = I x R.
(1) solve for I
I = V/R = Vbattery/(R1 + R2 + R3) = 23.7V/68.7ohms = 0.33498 A
= 0.33498 A x 1000
= 334.98 mA
(2) solve for VR3 - voltage (drop) across 6.7 ohm resistor
VR3 = I x R3 = 2.31 V < ur answer.
(3) check
VR1 = I x R1 = 7.83 V
VR2 = I x R2 = 13.56 V
VRtotal = VR1 + VR2 + VR3 = 23.7 = Vbattery !!
yay.
