what does 1N4001 denote of a diode and what does these names stand for?
929199
It's just a manufacturer's number.See the link below for info.
395873
The back EMF that must be protected against is often called inductive kick. It's a voltage spike that happens when you interrupt the current flowing through an inductance such as a solenoid or relay coil. The diode is more to protect what's connected to the coil (and probably what interrupted the current to the coil) such as a switching transistor or a set of contact points. The diode is connected across the coil and its polarity is such as to short out the spike. This always works out not to short the current away from the coil when current is flowing.\nMost motors and pumps being AC, a diode can't be used for such protection although the inductive kick can still occur. Surge suppressors are used instead.
457318
Look into some system info tools. There are many free ones out there that will give you the ID of various components in the system. Try a search for AIDA32. It's a good, free utility.
705690
The longer pin is the anode of the diode to identify it for proper biasing.
1049396
They are called Surface-Mount resistors, and they look like little rectangular boxes about the size of breadcrumbs.  Of course it's hard to tell which ones are resistors since diodes and small capacitors also come in this size and style.  If you've broken one off they are hard to get back on properly.  You'll need to ask a friend who has surface mount soldering skills and an expensive soldering iron made exactly for such a task.
365175
It actually refers to a memory location whose address\nin hex is 800H or in decimal it is 2048D.
724810
The link above dosn't give any usefull info its some product manual.\n\nall of these components use semi-conductors.\n\nA light dependent resistor is basicly what it names sugests, (it resists more as the amount of light falling on the semi-conductor material inside it increases). These are used in street lights and other such things and can be connected to relays wich can turn on and off circuits.\n\nA diode use two types of semi-conductor n and p(this means one has many "holes" and the othere dosn't (a hole implys a bond without an electron)) which are doped to a have an electric field that only allows current to flow in only one direction, These are useful for protecting other components like micro chips from being burnt by wrong flowing charge.\n\nA transitor uses three chunks of semi conductor in pnp or npn order, each pin on the bottom of a transitor is attached to each chunk. The transitor varys amplifys a signal with a very small current so are commonly used in things like radios for converting the electro magnetic wave to a sound wave. Transitors are also used in micro chips where (with modern technology) many thousands can be fitted in a just a square millemeter.\n\nIm sorry if my explanation seems a little breif but  the guys from AT&T how first descreibed semi-conductors got a Nobel prise and so far i havnt even got a physics AS.
858307
City and Guilds in electronic engineering, at a guess?\n\nOnly a guess mind - why dont you call the local company that installs them, or even ask your local fire brigade?\n\nHope that helps.
165079
The germanium diode have a forward voltage of .3 volts compared to the silicon diode with a forward voltage of .7 voltage.
280358
It stands for Universal Serial Bus.  It is called this because many different devices use it.
529126
it is actually very easy, but I dont know how to elaborate them here, I'll try my best.\n\nIx stands for input number x\nSx stands for output number x\n(you know this don't you?)\n\nConnect I4 - I7 to ground, Connect I0 - I3 to the input, you can get the output from S1 and S0, ignore the S2, as you only want 2 output -here you go, you got 4 input and 2 output, with a 8 to 3 decoder. Try it yourself.
250297
1.Current in the 385.451 V circuit is bigger.\n\nGod is spelled B-I-G B-A-N-G\n\nPBrax@netscape.com
221557
.01uF / 1210/ 50v/ avx /digikey.com/\nMIKE
685613
COULD MEAN DC # OR CODE FOR LIFE
931090
AC in and DC out.\n\nA diode only allows current to flow in one direction and blocks it if it is wrong.\n\nthe diodes in the bridge are connected together so that the +V current flows in One direction. the bridge .....( I cant be bothered)\n\nwikipedia has the answer...\n\nhttp://en.wikipedia.org/wiki/Bridge_rectifier
639965
Its a standard power screw. Depends on what info you are looking for. The basic equations are in several books and online.
277145
http://www.nphheaters.com/products/thermocouples/thermocouples_int_codes.html\n\ntry it..