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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
Why the magnetization current is not sinusoidal even though the input voltage is sinusoidal?
In ferromagnetic materials,such as electrical steel,the magnetisation curve is not a straight line,or else the relation B=μH is not linear ( μ is not constant),H is linear function of magnetization current,while B is linear function of input voltage ,so we have : Im=f(μ)U,where f(μ) is not constant,Im=magnetization (magnetizing) current, U=input voltage.
I hope this will help.
How does time relate to degrees in an AC sine wave?
One cycle of the sine wave is equal to 360 degrees. In US the frequency of power is typically 60 Hz and hence one cycle is 1/60 of a second. Therefore you can calculate the degrees at any instant of time. If at zero degrees the voltage amplitude is zero, then at 90 degrees,which is 1/4 cycle, wave is at peak voltage. At 180 degrees it is at 1/2 cycle and zero voltage and then at 270 degrees it is 3/4 of the cycle and a peak negative voltage. Finally at 360 degrees the cycle is complete and the voltage is again zero.
There are a number of major types of LED which are available and being developed. These LED types are summaries below.
Traditional inorganic LEDs: This type of LED is the traditional form of diode that has been available since the 1960s. It is manufactured from inorganic materials. Some of the more widely used are compound semiconductors such as Aluminium gallium arsenide, Gallium arsenide phosphide, and many more.
These LEDs are typified by the small LED lamps that are used as panel indicators, although there are very many formats for LEDs of this type. However even within the in-organic LED category, there are many different styles of LED:
Single colour 5 mm, etc - the very traditional LED package
Surface mount LEDs
Bi-colour and multicolour LEDs - the types of LEDs contain several individual LEDs that are turned on by different voltages, etc.
Flashing LEDs - with a small time integrated into the package
Alphanumeric LED displays
. . . . . more . . . .
All these different types of inorganic LED are used in very large quantities
Organic LEDs: Organic LEDs are a development of the basic idea for the light emitting diode. This type of LED uses organic materials as the name indicates.
The traditional types of LED utilise traditional inorganic semiconductors with varying dopant levels and they produce light from the defined PN junction - often this is a point of light. The organic type of LED display is based on organic materials which are manufactured in sheets and provide a diffuse area of light. Typically a very thin film of organic material is printed onto a substrate made of glass. A semiconductor circuit is then used to carry the electrical charges to the imprinted pixels, causing them to glow.
High brightness LEDs: High brightness LEDs, HBLEDs, are a type of inorganic LED that are starting to be used for lighting applications. This type of LED is essentially the same as the basic inorganic LED, but has a much greater light output. To generate the higher light output, this LED type requires to be able to handle much higher current levels and power dissipation. Often these LEDs are mounted such that they can be mounted onto a heatsink to remove the unwanted heat.
In view of their greater efficiency, this type of LED is being seen as a replacement for incandescent and the various other forms of energy saving or energy efficient lights such as the Compact Fluorescent Lightbulbs, CFLs. The HBLEDs have a greater efficiency level and they also have a longer life, especially when being switched on and off many times. Coupled with their instantaneous transition to full light output, this type of LED is being seen as the way forwards for lighting applications.
It is an electronic device. A sort of one way valve for electricity.
Where can one purchase flexible circuit boards?
The website electronics point allows one to purchase flexible circuit boards. There are also many websites that shows one how to create their own if they do not find one suitable.
What are the applications of limiter circuit?
Limiters find application in a variety of signal-processing systems. One of their simplest applications is in limiting the voltage between the two input terminals of an op amp to a value lower than the breakdown voltage of the transistors that make up the input stage of the op-amp circuit.
More common would be in radio. Limiters will allow certain signals below a specified input voltage to pass through the circuit unaffected, while signals that stringer will be attentuated. This is usually seen before the demodulation stage of the radio since a constant level of input signal is desired for optimal output.
What is the definition for diffusion?
Diffusion is one type of passive transport. In Diffusion, molecules move from a higher concentration gradient to a lower concentration gradient. Diffustion does NOT need energy, or ATP.
Q: What is the DEFINITION of DIFFUSION?
A: Diffusion- a type of passive transport in cells in which molecules move from areas where there are more of them to areas there are fewer of them.
ur wlcm (: SnazzyChazzy <33
What does scan disk checks and fixes?
As files are changed added deleted it is done at random sequence. CHECK DISK Will consolidate all this bits of files into a continuous file position whereby the access is continuous as opposed to bits and pieces all over the disc that will burn time to search for it. The check also check readability of the disc spot if not up to grade it will mark it unsafe to store there
Why TTL is preffered in case of microcontroller than CMOS?
TTL is preferred in n-mos technology because it produces more heat and thus it's preferable in microcontroller circuit but c-mos does not produce waste heat which is why TTL is not preferred in c-mos.
A circute diagram of sansui colour tv using str 5q1265rf in power supply?
A circuit diagram of str 5q1265rf
LRC parallel circuit contains its component in parallel connectio. It contains inductor, resistor and a capacitor. A parallel circuit is a closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit
Different between motorolla 6800 and Intel 8085?
in 8085 only one accumulator used where in 6800 used two accumulator.
with an ac motor you remove the ac apply dc and it stops it very quickly
most of the chop saws have a rather big universal motor
the trigger on the handle is released removing the power
the motor is coasting acting as a dc generator
then if you let off the trigger completely it shorts across the motor leads until the motion stops and there is no dc present
The frequency of a wireless signal is 249 MHz What is the wavelength in meters?
Wavelength = (speed) / (frequency) = (3 x 108) / (249 x 106) = 1.205 meters (rounded)
The sampling rate
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
Does a sub-woofer contains motor in it?
No.
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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 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
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.
Your current will be 30/R Amps. Where R is the resistance in Ohms.
