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Computers
This category includes questions and answers about computers and everything related to computers.
48,002 Questions
A group of lines that serves as a connecting path for several devices is called bus.In addition to the lines that carry the data, the bus must have lines for address and control purposes.
What type of motors are used in computers?
In any typical application (like desktop/personal computers), there would be two types of motors: brushless motors and stepper motors.
Brushless motors are usually used to run things that need to run without exact position control. These kind of motors are used in the computer cooling system (ie. cooling fans), and in some motive applications like optical media (driving the CD/DVD discs). These motors are generally a very good choice for two reasons: the don't have many parts that wear out (like brushed DC or AC motors), and their speed can be controlled rather precisely. These motors are driven with varying AC pulses (most commonly squares rather than sines), and usually have three leads (more rarely four) attached directly to the stator. If direct and precise speed regulation is not that important, they will usually just expose the positive and negative leads (typically red and black), keeping their driving electronics hidden inside the enclosure (in most cases - on a small disc-shaped PCB right under the rotor). They sometimes also expose a third lead for counting rotations, like cooling fans do (yellow wire). When mounted inside components (like DVDs), they are usually attached directly to the circuit board (typically glued/screwed in place). In most cases, these motors drive their load (fan, CD etc.) directly. They consist of many coils (how many - depends on construction) on the stator, and one permanent magnet on the rotor. When turned by hand, they usually turn freely.
Stepper motors are a more specific subset of brushless motors, giving much finer control of position, and they are generally much more precise. Stepper motors can also stop at a precisely defined position or turn only a precisely defined angle ("make a step", or halfstep etc. - thus "stepper" motors). These motors are used in optical media head drivers (ie. the motor that regulates where the reading/writing head is positioned), as well as floppy disk drives (very rare devices nowadays) and hard disks. These motors are also heavily used in inkjet/ribbon printers (printing head positioning), and in scanners (reading head positioning) - in general in all applications where invariability and precision are important. In most cases*, stepper motors drive their load (printing/reading heads etc.) indirectly through some form of a gearing mechanism - most notably a worm drive - to give finer control over the movement. They consist of many coils on the stator, and a matching set of small, powerful (rare earth) magnets on the rotor, thus enabling the stepping action. When turned by hand, they will show resistance and a tendency to "jump into" positions at regular intervals.
It is worth noting that while brushless motors do generate a lot of "chatter" on the power line (feedback from the driving mechanism, ie. noise on the line) while they spin, this is still nothing compared to brushed motors which can vary widely (and wildly). Also, brushless motor "chatter" can be predicted (and thus counteracted) with fair consistency.
* the most significant and commonplace deviation is the hard disk (HDD) platter drive. These stepper motors are used for their extremely precise speed control, and the platters are attached directly to them. These motors are designed with speed in mind as well (typically running at 7200 revolutions per minute, sometimes higher), but their fine speed and position control is used to make sure that the platter is in the correct "reading" position when the reading head is in the correct "reading" position as well, at those high speeds.
What device controls the computer's graphic?
The graphics card man it should be located near your ram cards
Explain van neumann architecture of computer system?
John Von Neumann's: One shared memory for instructions (program) and data with one data bus and one address bus between processor and memory. Instructions and data have to be fetched in sequential order (known as the Von Neumann Bottleneck), limiting the operation bandwidth. Its design is simpler than that of the Harvard architecture. It is mostly used to interface to external memory.
explain correctly what is von neumann concept?
an automatic programmable computer using a single shared common memory for storing both instructions and data.
This is in contrast to Harvard Architecture, which is an automatic programmable computer using two physically separate memories for storing instructions and data.
Most modern computers use a mixture of both: the CPU itself is Harvard, getting instructions and data from two physically separate caches; but the system as a whole is von Neumann, loading both caches from a single common shared memory.
How much money do you need to buy an apple computer?
You can get a brand new Mac Mini for $599. You will need a keyboard, Mouse, & Monitor of your own. You can get a brand new iMac for $1,299 or you can get a refurbished iMac for around $999.
How can you unknowning install malicious code on your computer?
Many things.
It can delete or damage files, and in so doing, destroy your personal files or your operating system. It can also overclock you processor to the point of failure or destroy it in other ways. It can also wear out Flash Memory or even RAM by sending excessive read/write commands for long periods of time, but this in not a common attack.
The most common in what I first mentioned: File manipulation. This is usually done to destroy your operating system.
ARPANET (Advanced Research Projects Agency Network) was an early packet switching network that became the technical foundation of the Internet.
Can an Asus laptop play games?
Yes. You can play games low requiments like red aleet 2 yuri, c&c general zero hour, counter strike source, total overdose,nfs hot pursuit 3, warcraft frozen throne, resident evil 4, and c&c red alert 3.
Do you have to pay month-to-month for Wi-fi when you already have a router?
no you do not have to pay monthly for a router, you buy the router outright from a shop or get it off your internet provider and then just pay the internet provider monthly for the internet connection.
Which country has the more computers?
- #1 Switzerland - 864.584 per 1 million people 2005
- #2 San Marino - 857.143 per 1 million people 2004
- #3 Sweden -763.012 per 1 million people 2004
- #4 United States -762.152 per 1 million people 2004
- #5 Israel -740.354 per 1 million people 2004
For a bigger list, go to http:/www.nationmaster.com/graph/med_per_com_percap-media-personal-computers-per-capita
Where can you ask for problems with your computer?
Go to your nearest computer store or P.C world and ask for advice, otherwise look up your problem on the web, if it's an apple mac then you can easily find it on 'Apple Discussion'. Good luck!
What is a series of instructions or commands that a computer follows used to create software?
program development
What is the processing speed of a microcomputer?
Current computer processor speed is about 2ghz, but older models are still in use. Average computer processing speed has increased dramatically in recent years.
What is the purpose of display processors in computer system?
The display processor read the data from the frame buffer and convert it into corresponding 1's and 0's according to there pixels and then put it on to a monitor screen.The display processor do this work 30 times per second to maintain a steady picture on the screen,and if we want to change the picture on the screen then we have to change the contents of frame buffer.
What device computer use to connect to high speed Internet?
Check out IVC Telecom for high speed internet
Difference between telephone network and internet?
Both are almost similar except internet service is more powerful than telephone network in a sense it never looses its ability to reach and you can even send ur messages to someone not online.. mean offline messages e-mails, attachment and much more..
there is difference in the hardware used between, in telephone we use telephone switches at central office but in internet more powerful and intelligent devices are used like layer 3 and layer 2 devices such as router, layer 3 switches, gateways etc
hope u understand
Does dell computers produce their own parts?
If you would like to know about Dell computer parts, I would check dell.com or call the number that is certainly on the back of your computer. If you are not a computer technician I would make sure to let the professionals do the job. Good luck!
How do workstations and deskstop computers compare?
the basic difference between desktop and workstation is that in desktop ecc ram( error checking and correcting ram) is not present while if i talk about in workstation ecc ram is present there as well as workstations are preferred due to higher applixcation like autocadd application,designing application, mechnical designing purpose and also as well as it is certified by isv( international software vendor). simply i can say that workstation are more powerful than desktop.
How do you use a computer in bank?
In banking, you would use a computer to calculate amounts of money etc. and you would keep all your details or your clients details on it.
You would use a spreadsheet to calculate different amounts of money like VAT, because a spreadsheet is like a massive powerful calculator that is easy to use.
You would use a database containing forms and tables to input, check and edit your details or your client's details. You might also have queries in the database to find people who fall into a certain category. For example you could have a query to find people who have under 5,000 in their bank account, and it will clearly list all the people who have less than 5,000
