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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
What are the principles of serial data communication?
It means the data can be transfer serially.i.e ,one by one. So it is less in speed.
Difference between isolation transformer and Scott-T transformer?
The Scott-T transformer was used to run 2-phase equipment from a 3-phase source. Older power distribution systems (and equipment) were 2-phase. An isolation transformer usually has the same input and output voltages (120:120, 240:240, etc) and is used to isolate the source from the load. Isolation transformers are used in medical equipment, for instance, to prevent a patient hooked up to a monitor from being electrocuted during an electrical fault.
What is RMS Peak value and average value?
RMS is used to determine the average power in an alternating current. Since the voltage in an A/C system oscillates between + and -, the actual average is zero. The RMS or "nominal" voltage is defined as the square root of the average value of the square of the current, and is about 70.7% of the peak value.
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The r.m.s. value of an alternating current or voltage is the value of direct current or voltage which produces the same heating effect.
Fo a sine wave, the r.m.s. value is 0.707 x the peak value.
The average value is different; for a sine wave it is 0.636 x the peak value.
How do you Test Schottky Barrier Diodes?
Set analogue multimeter to x 10 k ohm. Place the red probe to the cathode and the black probe to anode and you will get a low ohm reading. Now, reverse the probe and you will get some leakage reading. That leaking reading is what tells you this is a Schottky Barrier Diode.
Why the base bias Q-point in transistor circuits changes with temperature?
why we use base resistor in emitter bias
How can you filter harmonics from a square wave?
You can use a low-pass filter (passive is mostly coils)
but you won't end up with a square wave.
Are bipolar transistors a thing of the past?
Bipolar is still much faster and still can drive more devices than cmos. Military continues to use it along with companies like IBM. I think the PS3 uses those processors; the powerpc processors from IBM. The first 3 Pentium chips were BiCMOS in fact. It will always be needed
Bipolar transistors a thing of the past? Absolutely not! They're everywhere! It's just that a large majority of them are integrated into 1-piece circuits, the so-called integrated circuits. Many, many transistor junctions can be printed on a substrate (along with many other components), and we can end up with some very exotic circuits on a single chip. Just because you can't see 'em doesn't mean they ain't there. Your automobile almost certainly has a number of integrated circuits in it, and most if not all of them have bipolar junction semiconductor devices printed into the circuit. Count on it.
What is ultrasonic transceiver?
In general a transciever is a device that is both a TRANSmitter and a reCEIVER.
In practice an ultrasonic transceiver sends out sound waves at a frequency well above 20,000 cycles per second, and over a short distance will sense the reflections of these waves. Electronics attached to the receiver portion of the device are able to calculate the distance to the reflecting object.
This device was used in the Polaroid SX70 made in the 1970s as part of the automatic focussing mechanism of the camera.
There will be no "average" reverse breakdown voltage. When the applied voltage reaches 3.3v, the 3.3v zener will conduct and the voltage will go no higher. The 5v zener will never conduct because the voltage across it will never go higher than 3.3v The only way the 5 volt zener will ever conduct is if the 3.3v zener fails. ALAN H.
What is the significance of negative values of voltage and current?
What is the significance of negative values of voltage and current in the digital VOM?
The significance of negative values of voltage and current in the digital VOM is to show the accurate and full power that a particular device or equipment has in the result.
What are biological transducers?
Such type of transducer which can covert bio energy into any other form like mechanical or electrical. Example are engine or crystal. Engine convert energy from bio-fossil fuels to mechanical and crystal like tourmaline into electrical oscillations.
What are the two bias conditions for a diode?
The two bias conditions for a diode are forward and reverse
Why you are using negative voltage in the BTS?
1. To reduce the lighting effect mainly in rainy season.
2. Less corrosion because +ve can create more corrosion in the BTS system.
3. Safer for human body.
What are the applications of clap switch?
it acts as a direct switch by usingg a battery.
it is also used in transistors
What are applications of XOR gate?
It can be used as memory, it remembers the input of for instance A if the other input is 0. For example:
A
0
XOR
0
0
0
1
0
1
It is used to check the parity of received bits, in other words to checks the correctness of the data received (See Hamming fault correction) and can find and correct faults in a byte if there is only one fault.
It can also be used as a bit-flipper if one input is A and the other is 1. For example:
A
1
XOR
0
1
1
1
1
0
The uplink is the transmitter than sends the data up to the satellite. This can take the form of a dish or a highly directional antenna. You typically see these directional antennas mounted on telescoping poles mounted on the top of TV station news vans.
Why are low voltage electrical cables earthed and high voltage cables not in an electrical system?
The answer is more obvious if you use slightly different terminology to ask it. You could re-phrase the question as:
Why are the low-voltage wires in a building earthed , but high-voltage transmission lines not?
Wiring in a building or home that a person may come in contact with is earthed, or grounded for safety. If a live conductor in a grounded system comes in contact with an equipment frame or other metal object, fault current flows and trips the overcurrent device. If the building's wiring were not ground-referenced, you could have exposed live parts and not know it. Surprise!
On the other hand, high-voltage transmission lines are optimized to transport electrical power long distances. Power transmission typically uses 3-phase delta which does not need an earth connection. The grounded conductor, or neutral, is derived locally after the distribution transformer. Overcurrent protection is for the protection of the lines themselves, not for people that might accidentally come in contact with them! This is why there are such strict rules concerning keeping us separated from the transmission lines.
Keep in mind that the transmission towers themselves are grounded, and there is usually a grounded wire up top, but this does not form part of the transmission system, it is there for lightning protection.AnswerUnderground high-voltage cables are earthed.Repair shops for razor scooter?
If you go to razor.com and click on repair it should give you an option to find the nearest scooter repair to you.
Different between led infrared led?
Both are light emitting diodes, but an infrared led emits infrared light in the electromagnetic spectrum. With the naked eye, humans can't see infrared light but many cameras can. Infrared leds are used in remote controls and many other applications.
here, the power required by the receiver is the output power and that required from the source is input power.
Gain in dB=10 log(output power/input power)
we have, loss in dB = -gain in dB = 10 log(input power/output power)
or, 50 = 10 log(input power/10nW)
or, anti-log(5) = input power/10 nW
so the power required from the source is antilog(5)*10nW = 1 mW
In pn junction the depletion region capacitance increase with reverse bias or decrease?
any capacitance is given by equation C = (epsilon * A/ d) where d is distance between two plates, thus as d reduces C increases. Now, in depletion region as we increase reverse bias, the depletion region width increases. Now consider depletion region as a parallel plate capacitor, with positive charges on n side and negative charges on p side. Thus, as reverse bias increases, d of junction capacitance increases thus capacitance reduces. On other hand, as reverse bias reduces, d of junction capacitance reduces, thus capacitance increases. -Amey Churi
