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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
The total DC resistance is (33+47) = 80 ohms.
The total reactance is j(60+30) = j90 ohms.
The total impedance of the string is [ 80 + j90 ] ohms,
= 120.4 ohms at a phase angle of 48.37 degrees (both numbers rounded).
How far can Moore's Law be extended?
Moore's Law, the trend which states that the number of transistors that can be placed inexpensively on an integrated circuit doubles approximately every two years cannot go on for ever. So, it can be extended upto the point that our silicon technologies exhaust, by around 2020.
How do you get phase shift in Hartley oscillator?
basicaly the two inductors work as an autotransformer,providing a phase shift of 180 degree
What materials will you need to make a parallel circuit?
Lightbulb(load),Battery(Power source),Switch,Copper wire
What are the differences between analog and digital filters?
The ANALOG FILTER used in analog circuits.The DIGITAL FILTER USED IN DIGITAL circuits.
Abstract of electronic voting machine project?
Digital integrated circuits have ushered in a new era. Very soon nearly all gadgets will be controlled by these wonder chips. So why should the ballot box be spared ?
The Machine
The salient features of this machine are :-
a) There is a control unit which is used by the polling booth in-charge for enabling the voting machine. This can be compared to the issuance of a ballot paper to a voter after his credentials have been verified in the existing system.
b) The electoral symbols and names of the candidates are printed in rectangular spaces on the voting unit. The desired candidate is selected by pressing a switch.
c) For the benefit of the polling booth in-charge, total votes polled during the day are displayed continuously.
d) Results are retrieved by operating a 'result enable' switch. To ensure that result are not known during the voting period the 'result enable' switch is operated by the presiding officer. The biggest advantage of the electronic voting machine is that the results are available immediately at the end of the voting period.
e) Last but not the least the machine has been designed in such a way that multiple voting is not possible. Once the machine is enabled only one vote can be cast.
Your Iphone won't do anything at all?
I think you're trying to say ' why won't your iphone do anything at all? '. It might be because it was probably broken when you got it, or possibly you accidentally did something to it and you couldn't remember that you did it, or maybe something else. I suggest that if you aren't pleased with it ( and I think you would be ), go to the place that you got it and see if they can fix it. Hope I helped!!
A.C. quantities are always expressed in root-mean-square(r.m.s.) values, unless otherwise stated. For sinsoidal waveform, this equates to 0.707 times the peak value. For example, an AC current with an amplitude of 100 A has an r.m.s. value of 70.7 A.
An a.c. current expressed as an r.m.s. value will do exactly the same amount of work as a d.c. current of the same value. In other words, a 50 A (r.m.s.) a.c. current will do exactly the same amount of work as 50 A d.c. This is why r.m.s. values are also referred to as 'effective values' of a.c..
Two resisters have the same resistance but different cross sectional area what is difference?
If two resistors of have same value but different in shape or cross sectional area, as you said so. Then the difference may be the length of the other resistor. In short, one resistors cross sectional area is wide and other is lenghty.
Will a 5X112 with 40mm offset fit a 5X110 with a 42 mm offset?
You've got to go with a 5 x 110 wheel unless you get an adapter. Probably best to just find a 5 x 110. Offsets have nothing to do with it. To answer any question about offsets, need to know the rim width. If that changes (really, if the rim width increases) it can get (a little) complicated. There is somewhere on the web an offset calculator. Too much positive offset means possible interference with inside stuff like spindles, suspension components, etc.
Why Lg rd 3500 dose not power on by a charged battery but gets on by plug in charger?
rd 3500 low battery salution
Explain the use of flip-flops to eliminate contact bounce?
There are several ways to use flip-flops to eliminate contact bounce. One way is to pull the contacts up with a resistor and connect them to the set- and reset- inputs of an SR flip flop. On set/make, the flip flop will change state, but it will not change state just because the contact bounces. On reset/make, the same thing happens in reverse. The result is that the flip flop will follow the switch without bounce.
In order for this to work, however, the switch must be a double throw, break before make, type of switch; and the bounce must not include bouncing that touches the contact just broken - it can only include settling bounce off of the making contact.
If the switch is a common bus bar design, say the keys on an electric piano, you could use two different voltages on the bus bars, and sense the voltage of the contact, differentiating between up, down, and in between. This is more complex, but the philosophy is the same.
What is the advantage of silicone breast implants?
There are many aesthetic and texture advantages to silicone breast implants. Many people feel that the silicone breast implants look and feel more like natural breast tissue than saline breast implants, which are a popular alternative for enlargement surgery. These advantages make the general results of the surgery seem more subtle, and natural results are the most ideal ones to go for.
divinecosmeticsurgery
Transistor as an amplifier common emitter configuration explanation using kirchhof's law?
Kirchoff's current law states that the current in every point in a series circuit is the same.
In the case of a transistor in common emitter configuration, you can take advantage of that fact and state that the collector current is equal to the emitter current. The truth is somewhat different, because the gain of the transistor is not infinity, so the base current must be added to the emitter current. With a reasonably high gain, however, you can ignore the base current.
Consider that the emitter voltage is related to the base voltage by the forward drop of the base-emitter junction, about 0.7 volts, and the collector and emitter currents are the same. Now look at the collector and emitter resistors. If the currents are the same, and the voltage across the emitter resistor is known, then you know the voltage across the collector resistor as well. This is an application of both Kirchoff's and Ohm's laws.
The gain, then, of this amplifer is collector resistance divided by emitter resistance. It is an inverting amplier in this configuration. In some configurations, the emitter resistor is zero ohms. This does not mean the gain is infinity - it now means that the gain is limited by the gain of the transistor, which it is anyway - the emitter resistor is used to stabilize the gain and reduce dependency on individual transistor gains, which do vary.
What is the difference between PIN diode and Avalanche Photo diode?
ets see the comparison of LED Diode vs LASER Diode.
LED Diode :
-Full form of LED- light emitting diode.
-LED's are small in size, longer life, reliable and require little power.
-Here generation photon by spontaneous emittion.
-LED's produce a divergent and incohrent light beam.
-Types of LED 1> surface emitter and 2> Edge emitter.
-Their response is fast.
-A wide range of wavelengths is available.
-The cost of LED would be less.
-An intensity of generating light is less.
-Coupling efficiency of LED with fiber is less.
-LED's use with the multimode fibers.
-Bandwidth of led is moderate.
-In led have require no extra circuit because of its simple circuit.
-Here require drive current is 50 to 100mA.
LASER Diode :
-Full form of LASER - light emplification by stimulated emmition of radiation.
-Laser's are bigger in size, longer life, less reliable and require more power then LED.
-Here generating photon by stimulated emittion.
-Laser produce q monochromatic and coherent light beam.
-Types of Laser 1> semiconductor laser and 2> Gas laser.
-Their response is faster than LED.
-A small range of wavelength is available.
-The cost of Laser would be higher.
-Coupling efficiency of Laser with fiber is higher.
-Laser use with both single mode and multi mode fibers.
-Bandwidth of laser is higher.
-In laser have require extra circuit for isolation of temperature reaction.
-Here require drive current is Therashold current 5 to 40mA.
Look at is from a waterfall point of view. If there is more current, is the water flowing faster or is there more water? (If you do not catch on, there is more water and for your question, more electrons.)
Electroncs cannot travel faster, they travel at the same speed, and they reach destination faster or slower depending on resistance.
Calculate the wavelength of 146 mhz?
The wavelength of a frequency is the propagation speed divided by the frequency.
A wave of 146 MHz, with a propagation speed of 3x108 m/s (speed of light), has a wavelength of 3x108 divided by 146x106, or about 2 m.
What ggs college of modern technology ranks in ptu?
Yeah! I was a Engineering Graduate student of GGS College, Kharar, My opinion is that GGS is not much good college if you want take placement, it is good in study workload on students and some activities............
If i evaluate the points grading with 10, i give him 4/10.
Why are AC and DC resistance different?
An AC current tends to flow towards the surface of a conductor due to a phenomenon called the 'skin effect', which acts to reduce the effective cross-sectional area of that conductor.
Since resistance is directly-proportional to the cross-sectional area of a conductor, the conductor's resistance to an AC current is, therefore, higher than its resistance to a DC current (which distributes itself across the full cross-sectional area). We call this elevated value of resistance, AC resistance.
The skin effect increases with frequency to such an extent that, at radio frequencies, there is little point in using solid conductors and tubes are used instead. At mains' frequencies (50/60 Hz), however, the skin effect is moderate and, so, the value of a conductor's AC resistance is only slightly elevated compared to its true resistance.
It's important not to confuse the term 'AC resistance' with 'reactance', which is a function of a conductor's inductance and/or capacitance, and the frequency of the supply.
What is the modulation technique used in microwave pdh as nec equipment?
QAM...
(16 QAM, 256 QAM) according to capacity
What is the total resistance if they have equal resistances in series in each of rows in parallel?
If the overall load consists of:
'R' = resistance of each individual resistor
'S' = number of resistors in each series row
'P' = number of series rows connected in parallel,
then the effective overall DC resistance of the entire network is
[ R S / P ]
A circuit has a voltage of 240 volts and an inductive reactance of 30 ohms what is the current flow?
A circuit with a voltage of 240 volts and an inductive reactance of 30 ohms would have a current of 8 amperes.
Reactance works just like resistance. The difference is that the phase angle between voltage and current is not zero, so the ratio of true power versus apparent power is not one.
Phase angle and power factor depend on frequency. This was not specified in the question, so it is not answered.
How do currents flow round two series and parallel circuits?
In a series circuit, the current does not change. It is simple the total voltage divided by the total impedence. However, in a parallel circuit the current splits. More current will go down the path with less impedence, and vice versa. For example, you have two parallel branches, 1 and 2, with resistances R1 and R2 respectively. Also, the total current flowing is I, while the current down each branch is I1 and I2.
I1= I(R2)/(R1+R2)
I2= I(R1)/(R1+R2)
Also note that I1 + I2 = I.
Examples of commonly used P-Type and N-Type in purities?
Examples of P-Type Impurities are Boron,Indium and Gallium arsenide Examples of N-Type Impurities are Antimony,Phosphurus
