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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 base of transistor is lightly doped?

The width of the base is very thin to increase the majority carrier concentration gradient in the base region thereby enhancing the diffusion current and also to reduce the number of majority carriers lost due to recombination in the base.

What is a basic element of communication?

The basic element of communication is speech. You can speak or write to someone in order to communicate with them.

How embedded systems is used in dishwasher?

Yes an embedded system by definition is a combination of hardware and software,here both are combined together for a specific task .

Applications of a dc shunt generator?

DC series generators are generally used as Voltage Boosters

What is the meaning of the word electronic sources.?

its acctually a phrase...an electronic source is somewhere in which electricity comes from e.g. plug socket, generator, battery, computer power supply...

Is it correct to say that a bulb in a circuit is a resistor?

Yes it is. The filament in a standard incandescent bulb is a type of resistor. An incandescent light bulb contains tungsten which reduces electricity and converts electricity to heat and light. All incandescent bulbs are resistors, but only a fraction of resistors are bulbs.

If you want to see if a bulb is a resistor, try adding another bulb in series without changing the voltage. Both bulbs will be very dim. Another way to test this is to get a multimeter and set the meter to the resistance setting. If you get any value other than zero, then it is functioning as a resistor.

What is the difference between a gigabyte and MHz?

gigahertz is the processing speed of your CPU(eg. 1.8GHz,2.8Ghz etc).It's the speed at which your processor runs. Gigabytes is the unit in which data(any data)in your RAM,HardDisk,Memory card or any other storage device can be stored is measured.simply,Its the unit to measure the data storage capacity.Eg- 2GB RAM,160GB hard disk etc..

5 ways of increasing the Capacity of cellular system?

Increasing Channel Capacity

Adding new channels: Typically, when a system is set up in a region, not all of the channels are used, and growth and expansion can be managed in an orderly fashion by adding new channels.

Frequency borrowing: In the simplest case, frequencies are taken from adjacent cells by congested cells. The frequencies can also be assigned to cells dynamically.

Cell splitting: In practice, the distribution of traffic and topographic features is not uniform, and this presents opportunities of capacity increase. Cells in areas of high usage can be split into smaller cells.

Cell sectoring: With cell sectoring, a cell is divided into a number of wedge-shaped sectors, each with its own set of channels, typically 3 or 6 sectors per cell. Each sector is assigned a separate subset of the cell's channels, and directional antennas at the base station are used to focus on each sector.

Microcells: As cells become smaller, antennas move from the tops of tall buildings or hills, to the tops of small buildings or the sides of large buildings, and finally to lamp posts, where they form microcells. Each decrease in cell size is accompanied by a reduction in the radiated power levels from the base stations and the mobile units. Microcells are useful in city streets in congested areas, along highways, and inside large public buildings.

By Ratnakanthan

What is register in computer and it types?

A register is temporary memory which can store single bit of data....

Meaning of electronics and communication?

It is a field of engineering in which we learn about the electronic component.This is the one of the branch in which we can implement our ideas and theory in developing of new electronic circuits or improving existing circuits. generally these circuits has use in communication for example mobile communication,optical fibre etc.

Which is an example of biased reporting?

A journalist does not use any interviews or direct quotes in his or her report.

What are advantages of voltage divider bias over the other types of biasing ci?

You can use more than one type of voltage divider in it. It can sometimes get mixed signals with all the things going on.

Working principle of cathode ray oscilloscope?

A scope is nothing else then a display instrument it will amplify and display a signal on a CRT for visual analysis

What are advantages of transducer?

What is piezoelectric effect. Every day use of this phenomena is used in load cells. Load cells are used on large weigh scales for trucks and large bin scales where materials need to be weighed. The signals from the cells are calibrated to compensate for the weight of the scale so that the scale can be zeroed out. The cell signal, because it is very small, is sent to an amplifier head where is can be read by the operator in units of weight. The head unit can be set to read in metric or imperial weights. Advantages. As explained in your above question on weigh scales the load cells do away with all the mechanical linkages that the old systems had to use. These linkages were always prone to mechanical damage where as the load cells are self contained sealed units. There are four units per scale, one under each corner. I brought my two answers together to make more sense

What is 3D TV?

It is television or video that gives its viewers a perception of depth. That is, a viewer can feel the depth of different objects while watching TV. The same perception of depth was possible earlier with Stereoscopic TV.

This perception of depth is given to the viewers by providing slightly different views of the same scene, to each eye of a user. By analysing the differences between these two images, the human brain is able to distinguish objects at different depths.

In stereoscopic TV, all the viewers of the scene will see the same view. This is similar to the present IMAX cinemas, which shows 3D movies. The difference between 3D TV and stereoscopic TV is that, different views will see different views of the same scene. For example, in a future cinemas the displays 3D movies with this technology, the viewers will see different views of the scene, depending upon the place they sit, in the cinema.

Of course, you still need to wear the special kind of 3D glasses because the technology that would let us see in 3D is still in the laboratories. However, these are not the same kind of glasses you get given in the cinema, the 3D glasses you use to watch 3D television are a special kind called Active Shutter Glasses.

What is the full form of umts?

U niversal M obile T elecommunications S ystem www.iec.org/online/tutorials/umts

Function of demultiplexer?

A demultiplexer is a circuit. It has one input but more than one output. A demultiplexer gives binary information from one end to another. It is used to connect a single source to many destinations.

Why current flow from higher voltage to lower voltage?

Normal flow of electrons are from positive to a less negative potential. When a potential is applied meaning voltage electrons leave their orbit and move to another nucleus leaving at the same time a hole to be fill out by the next electron coming in. In essence electrons flow one way and holes flow in the opposite direction. It is possible to have -100v flowing into a -90v. electrons do not know what the potential can be raised to all they know is the differential potential of 10 v in this case

Answer

It doesn't. If flows from a higher potential to a lower potential. Voltage means 'potential difference', which is quite different.

A 'higher potential' is conventionally taken as meaning 'more positive', while a 'lower potential' is taken as meaning 'less positive'. The direction of conventional current (plus to minus), therefore, is from a higher potential to a lower potential.

Electrons, on the other hand, move from negative to positive, so they move from a 'lower potential' to a 'higher potential'.

Truth table for 3 input xor gate?

Exclusive Or means "one and only one of many", so the truth table of a 3 input XOR gate would be

000 0

001 1

010 1

011 0

100 1

101 0

110 0

111 0 ... or 111 1 ... see note

Many references say that 3 input XOR gate's output should be 1 when the no of 1s in inputs is Odd, and 0 otherwise. So in the given truth table, when the input is 111 output must be 1 , i.e. 111 1

plz note -- for 111 1 must be the optput.. i confirmed it

What is a disadvantage of microelectrode recording?

The microelectrode recordings are able to provide surgeons with images of specific brain structures. The advantage of using the microelectrode recording is that the structures are able to be identified in order to implant a pulse generator and affect disease symptoms that the patient has. The electrical stimulation has different effects per patient, however, the surgeons are able to learn more of the patients disease and conditions by watching these recordings.

How are printed circuit boards manufactured?

Printed circuit board are electronic circuits created by mounting electronic components on anonconductive board, and creating conductive connections between them. The creation ofcircuit patterns is accomplished using both additive and subtractive methods. The conductivecircuit is generally copper, although aluminum, nickel, chrome, and other metals are sometimesused. There are three basic varieties of printed circuit boards: single-sided, double-sided, andmulti-layered. The spatial and density requirement, and the circuitry complexity determine thetype of board produced. Printed circuit boards are employed in the manufacturing of businessmachines and computers, as well as communication, control, and home entertainment equip-ment.

Function of a variable resistor?

Variable resistor is an resistor that can change its resistance manually, by rotating a handle or a screw.

How many amps should a 0.5 horsepower motor draw?

Depends on the voltage. If you are running off 120 VAC, a 0.5 horsepower motor would draw 3.1 A.