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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
555 is an arbitrarily assigned part number for a general purpose programmable timer IC. The number itself has no special meaning.
What are advantage and disadvantage of analog and digital signal?
Hey here you go
Analog:
More complex in design.
Don't require memory.
more noise prone.
identical systems are impossible to design.
There is always a risk of oscillations due to instability.
Digital:
Lower complexity.
may require memory.
repeated inputs are possible.
more noise immunity.
identical systems are possible.
lowered risk of instability.
What is percentage regulation in transfarmer?
percentage regulation is defined as
[{v(no load)-v(full load)}/v(full load)]*100%
it gives the variation of output dc voltage(voltage across load) with variation in load resistance
assuming you mean electromotive force:
emf is the main principle behind power transformers. emf also comes in the form of radio waves, which are used for radio transmission (obviously)
Dopants are elements added in very tiny quantities to semiconductors as impurities that modify the electrical characteristics of the semiconductor. They fall into two types, depending on the type of current carrier they introduce into the semiconductor: p-type and n-type.
The p-type dopant elements are: boron, aluminum, gallium, and indium; because they have only 3 valence electrons (not the 4 that elemental semiconductors do) they leave voids in the valence band that can act as mobile current carriers called "holes", as these "holes" act as moving positive charges a semiconductor so doped is called p-type semiconductor. The n-type dopant elements are: nitrogen, phosphorus, arsenic, and antimony; because they have 5 valence electrons (not the 4 that elemental semiconductors do) they create extra electrons in the conduction band that are mobile current carriers, as these electrons are moving negative charges a semiconductor so doped is called n-type semiconductor.
Note: neither p-type semiconductor or n-type semiconductor is electrically charged, any more than a regular conductor is electrically charged. The charge of the mobile current carriers in each case are balanced by the nuclear charge in the atoms.
This ability to make materials that conduct electricity using both "holes" and electrons in different parts of the one piece of material allows the creation of electronic components that could never have even been imagined when the only materials known that conducted electricity used only electrons.
Why OR gate is called inclusive OR?
Because the output is true when more than one input is true. In addition to the output being true when one input is true, then inclusive or gate "includes" other combinations of inputs that are multiply true.
What are Advantages of using gate array in digital design?
The advantages of using an array are that lists of the same data types can be stored easily without the need for a connection to a database. For example, a list of names can be stored in an array and only one variable need be declared.
- Mike Hoerger
SCR's are mainly used in AC circuits. They could be used in DC circuits but they then would not be able to turn off. They require the zero crossing of the AC circuit to turn off. Then when positively biased they can be turned back on.
How 3db dandwidth equals half power bandwidth?
"3 dB" is a nickname for "1/2 power".
"1/2 power" in dB = 10 log(1/2) = 10 (-0.30103) = -3.01 dB
Do resistors resist differently under different temperatures?
Yes.
Most high quality resistors has got a sixth band of colour.
This band indicates Temperature Coefficient in PPM (Parts per million).
These resistors typically only rise in value within their specified range of temperature.
Note:
All resistors vary slightly whether they are marked with temperature coefficient or not. Those unmarked colorful resistors typically have a TC of 200 PPM or more. The problem with the unmarked resistors is also that we do not know exactly how they behave when being exposed to higher temperature. Most will have increased values. Some will have decreased values. Others will have a combination of these for different temperatures.
Color codes used on resistors are:
(Look at related question below for a full explanation of these, including calculating temperature drift.)
Colour valueMultiplierToleranceTemperature CoefficientSilver 0,01Silver 10%Gold 0,1Gold 5%Black 01Brown 1101%100ppmRed 21002%50ppmOrange 31k15ppmYellow 410k25ppmGreen 5100k0,50%Blue 61M0,25%Violet 710M0,10%Gray 80,05%White 9
How is -900mV expressed in volts?
A: Milli kilo represent a multiplier 900 mv is equivalent to 0.9 volts or 0.0009 kilo volts the value remain the same just the decimal move 3 places
What is the meaning of voltage control device and current control device y they call like this?
In vcd, input voltage controls the output current.e.g.jfet
In ccd , input current controls the output current. e.g. bjt
A CPU works off of DC voltage. If you monitor the current draw of a CPU, it will likely not be DC, since a modern CPU is a CMOS design, current is only drawn when transistors are switched (ignoring the small leakage current). This is why overclocking (forcing the transistors to switch faster) can cause the CPU to overheat, and why "power save" mode on a laptop sometimes slows down the processor speed.
Is continuity less than 5 ohms?
To determine if continuity is less than 5 ohms, you would typically use a multimeter set to the resistance (ohms) mode. If the measured resistance is below 5 ohms, it indicates good continuity, suggesting a low-resistance connection. If it is 5 ohms or higher, the continuity is not considered optimal. Always ensure the circuit is powered off before testing for safety.
The N95 mobile device does not refer to a specific invention but rather to a line of mobile phones developed by Nokia. The Nokia N95 was released in 2007 and was designed to be a multimedia smartphone with advanced features for its time, such as a high-resolution camera and GPS capabilities. It was part of Nokia's Nseries, which focused on multimedia functionality.
Why the maximum voltage is to be multiplied by 0.707 in case of series LCR to obtain bandwidth?
The factor of 0.707 is used to convert the peak, or maximum voltage or current, into the corresponding root-mean-square (r.m.s.) value. it does not have anything to do with 'bandwidth'.
Technical noise is also considered physical noise. Physical noise is anything that prevents you from hearing something such as adult noises,White noise and background noises are technical noise.
What is the power rating of a resistor?
The power rating of a resistor determines how much power it can dissipate without being damaged. For example, a 1/4W resistor is designed to handle up to 1/4W continuously without being destroyed. When selecting a resistor to use in a circuit, use Ohm's law to calculate the power it will dissipate. For example, placing a 1kΩ resistor across a 12VDC signal will allow 12/1000 = 0.012A to flow thru the resistor. 0.012*12 = 0.144W will be dissipated. Thus, a 1/8W (0.125W) resistor would not be sufficient, and a 1/4W (0.25W) must be used.
Why the IC s are started with 74?
really there is no reason for naming it like that. the name was simply chosen by TI.
