0
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
Why is ce configuration employed in transistors?
for the same reason cs is employed with FETs and cc is employed with vacuum tubes: high voltage gain & high current gain.
Series circuit gives higher resistance compared to parallel circuit.
What is a bridgeable amplifier?
A bridgeable amplifier is a two channel amp where the two sections can be combined and used as a single channel amp with much higher (usually around double) power output.
There will be a switch or jumper that enables the bridge. Only one of the two inputs are used. The output is taken from the two positive terminals, one from each channel. The negative or common output terminals are not used.
A bridged amp fed from an electronic crossover is used a lot to feed a high-powered sub.
How do chronograph watches work?
A chronograph watch can be started, stopped and returned to zero. The chronograph watches are usually used purely for the timing purposes.
Breakdown phenomenon of semiconductors?
Ther are generally Two types of Breakdown Phenomenons comes into picture. Namely-
1. Avalanche Breakdown
2. Zener Breakdown.
These are two completely different units of measure. MHZ (megahertz) measures frequency as cycles per second. MB (megabytes) measures memory storage.
After hexadecimal which one is developed?
The hexadecimal system is the fourth system based on powers of two that use the decimal digits 0 through 9. Since 16 symbols are needed the letters a through f are added. The next system would use 32 symbols so 22 additional symbols would be needed.
What is the resistance of an inductor called?
The resistance of an inductor is generally referred to as the series resistance, sometimes noted as RL.
Note that resistance is a DC measurement and that an "ideal" textbook inductor has an RL of 0.
The reactance of an inductor is an AC measurement which measures the reaction of a component's current flow to an alternating voltage and is frequency dependent and directly proportional to the inductor's inductance, measured in Henrie's.
The impedance is most commonly used when talking about inductors or capacitors and is a combination of resistance and reactance.
What is the difference between electrical circuit and electronic circuit?
One view point is that "Electrical" relates to the development and delivery of the electrical energy to the various devices that perform specific functions in a given environment. Example: The alternator in your car that series of wires delivers electrical power / energy to various components (radio, the computer that monitors / controls operation of the engine) in todays cars. Where as "Electronics" relates more to the complex functions performed within a given device, more often now days by circuits comprised of many micro electronic sub components that make up the structure of a single micro electronic component. Example: a typical CPU chip would / could contain thousands of individual transistor circuits within a device no bigger that the size of your small finger nail with room to spare.
What is diffusion capacitance in pn junction?
A capacitor is a device that stores charge. Therefore any device that stores charges( static or dynamic) can be said to have capacitance.
When a PN diode is forward biased, a current flows due to the majority charge carriers. At a particular instant there will be charges in motion. This is dynamic charge. The capacitance due to storage of dynamic charge is called the diffusion capacitance.
We know that C = Q * V. That is capacitance is directly proportional to charge stored. Since the diode current increases exponentially with the voltage applied across it, the dynamic charge also increases exponentially . Hence the diffusion capacitance increases exponentially with the increasing diode voltage.
What is The scientific word that means a unit of resistance to the flow of current?
The unit of electrical resistance is the "Ohm", written with the upper-case Greek Omega . . . Ω
Why do we get an electric shock when we touch car doors on dry days?
You generate static electricity from brushing against things, or your clothes brushing against you. On humid days, the charge is bled off as fast as it builds up. On dry days, the air is a good insulator- the static charge builds up to the point that you get a "zap" when you touch the metal door, and the charge is grounded. Working with helicopters in Alaska in the winter (VERY dry air) we would see a spark of 2-3 feet long when grounding a helicopter that was hovering.
What current will transfer 96 500 coulombs in 1 hour?
1 hour = 3,600 seconds
96,500 coulombs/hr = (96,500 / 3,600) coulomb/sec = 26.8056 Amperes (rounded)
What will happen if dc supply is given to shunt dc motor?
It will drawn a large amount of current which can destroy the shunt
How can the terminals of the diode be identified using the ohmmeter?
More commonly, the RED probe is on the banded (cathode) end of a diode, when the meter reads.
You can also use a high ohms range (try around 200K) with a digital ohmmeter, not all have a specific "diode" setting.
So test the meter first with a known marked diode, one that has a band on 1 end. You should get a reading with the probes around 1 way, and not the other.
The probe on the banded end when the meter reads is the negative lead. Usually, that's the red one. So testing future diodes, if the meter reads, the red is the cathode of the diode.
The polarity of the voltage appearing between the probes of digital and most analogue meters is opposite.
The red lead of a digital meter is positive on the ohms ranges, while on most analogue meters the red lead is negative on the ohms ranges.
What you can do after degree in electronics and telecommunications?
You could go into teaching or you could get a job manufacturing circuits/circuit boards.
How does your power in climbing a flight of stairs compare with the power of a 100 W light bulb?
One joule is the amount of energy required to apply a force of one newton through a distance of one meter (one newton-meter), or it is the amount of energy required to produce one watt of power for one second (one watt-second).
If we assume that you have a mass of 200 pounds or 91 kilograms, then it requires a force of 891 newtons (91 * 9.82) to support you. This force will be the same whether you are standing still or climbing, even though it will momentarily change when you accelerate, so we can use 891 newtons.
If we then assume that a flight of stairs is about 3 meters, we can calculate the power to climb up at 891 * 3 = 2672 joules per flight.
Lets look at the light bulb. That one is easy. 100 watts is 100 joules per second.
Now the question is, how fast can you climb? Let assume 10 seconds per flight of stairs. That translates to 267 joules per second, so you use nearly three times the energy of a 100 watt light bulb to climb stairs. (Two times, if you climb a little bit slower.)
What is the components of intermediate frequency amplifier?
- 110 kHz was used in Long wavebroadcast receivers. [1]
- Analoguetelevision receivers using system M: 41.25 MHz (audio) and 45.75 MHz (video). Note, the channel is flipped over in the conversion process in anintercarriersystem, so the audio IF frequency is lower than the video IF frequency. Also, there is no audio local oscillator, the injected video carrier serves that purpose.
- Analoguetelevision receivers using system B and similar systems: 33.4 MHz. for aural and 38.9 MHz. for visual signal. (The discussion about the frequency conversion is the same as in system M)
- FM radioreceivers: 262 kHz, 455 kHz, 1.6 MHz, 5.5 MHz, 10.7 MHz, 10.8 MHz, 11.2 MHz, 11.7 MHz, 11.8 MHz, 21.4 MHz, 75 MHz and 98 MHz. In double-conversion superheterodyne receivers, a first intermediate frequency of 10.7 MHz is often used, followed by a second intermediate frequency of 470 kHz. There are triple conversion designs used in police scanner receivers, high-end communications receivers, and many point-to-point microwave systems.
- AM radioreceivers: 450 kHz, 455 kHz, 460 kHz, 465 kHz, 470 kHz, 475 kHz, 480 kHz
- Satellite uplink-downlinkequipment: 70 MHz, 950-1450 Downlink first IF
- Terrestrial microwaveequipment: 250 MHz, 70 MHz or 75 MHz
- Radar: 30 MHz
- RF Test Equipment: 310.7 MHz, 160 MHz, 21.4 MHz
What is the demand of a instrumentation engineer in abroad?
"Abroad" is not very well-defined if we don't know what country you live in.
How a Cathode Ray Oscilloscope is used to measure Period?
period are measued in oscilloscope by using or calculating time division
characteristic of Gray code
How do you get into a second generation iPod touch if you cant remember the passode?
You will need to plug it into iTunes and reset it to factory settings. Although you will lose all information on it, the passcode will be disabled.
What is the function of armature winding?
The winding function of an electric motor is a description of how the number of conductors in the windings around the motor changes with position.
