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A diode is to electricity quite similar to what a "one way valve" is to water. The band on the diode indicates the flow - a bit like an arrow might on a water valve.
Some components - like resistors - can be put in either way around, but a diode is "polarised" - it has a cathode (-) end and an anode (+) end.
A good example of where you might use one would be in a simple battery charger for your car battery. A transformer will turn the household mains into around 15V, which will then go through a diode and you connect the side with the band on to the POSITIVE of the battery and the other wire from the transformer to the negative. This is a VERY crude charger but it would work fine for something like a car battery. You would need quite a chunky diode, capable of handling a few amps.
To conclude though - It has a band because it needs to be inserted into the circuit the right way around in almost every application. (If it is used to simply chop an AC signal, sometimes it doesn't matter which way it is inserted)
Google or Wikipedia will give lots more information if you are interested - and if you search for PIN diodes you can even see simple/crude designs for radar detectors.
The old "Cat's Whisker" galana crystal used in radio sets was in fact a very early form of diode made from lead (II) sulphide.
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Why does silver conduct electricity?
Because it's a metal. No, seriously, that's why. Metal atoms share electrons in what's called the "metallic bond"... electrons are not strongly associated with one or even a few atoms, but can fairly freely move throughout the entire bulk of the metal. These "conduction band" electrons make it easy to put electrons in at one end and get (different) electrons out the other end of a piece of metal.
Which one of the following Does not contain silver 1. horn silver 2. german silver 3. ruby silver 4. lunar caustic?
horn silver
Is silver alloy real silver?
It is a metal consisting of silver and one or more additional metallic components.
Suppose that 273g of one substance listed zinc silver lead displaces 26ml of water What is the substance?
aergtshdju
Is the value of sterling silver different than 925 silver?
No. Sterling Silver is 925 Silver (they are one in the same)Sterling Silver - Sterling silver is a composition of 925 parts pure silver with 75 parts of copper
How do you know which way a diode will let current flow?
Most diodes have a band (or marking), at one end. The band end is considered the positive end. You can also consider the "band" as a symbol of a gate or blockage. Power flowing from the non-band end to the band end will flow, but power flowing from the band end backwards will not. (That's my method that works for me).
How does a diode respond when a current source is connected?
The current will flow in one direction only. That direction is indicated by, usually, a ring around one end of the diode. The current will flow from the unmarked end to the marked end.
When does the diode not allowed to flow the current?
A diode is a one-way gate for electrical current to flow through. You must have the right size diode for the amount of current that will be used in your circuit. The stripe on the diode is your output end. That is, the current must enter your diode at the non-stripe end and leave at the end with the stripe. This coincides with the diode symbol used on your schematic. If your diode is in backwards, the circuit will not work as the gate in the diode will block the current just the way it should.
When did Plus One - band - end?
Plus One - band - ended in 2004.
When did Number One Fan - band - end?
Number One Fan - band - ended in 2005.
When did One Man Army - band - end?
One Man Army - band - ended in 2005.
How can the terminals of the diode be identified using the ohmmeter?
More commonly, the RED probe is on the banded (cathode) end of a diode, when the meter reads. You can also use a high ohms range (try around 200K) with a digital ohmmeter, not all have a specific "diode" setting. So test the meter first with a known marked diode, one that has a band on 1 end. You should get a reading with the probes around 1 way, and not the other. The probe on the banded end when the meter reads is the negative lead. Usually, that's the red one. So testing future diodes, if the meter reads, the red is the cathode of the diode. The polarity of the voltage appearing between the probes of digital and most analogue meters is opposite. The red lead of a digital meter is positive on the ohms ranges, while on most analogue meters the red lead is negative on the ohms ranges.
Infinite resistance in one direction of Diode?
After isolating the diode from the circuit, the diode shows infinite resistance in one direction and low resistance in the other direction. The diode
How can you reduce back current while using relay?
You put a diode in parallel with the coil. The cathode end of the diode connects to the plus side of the coil and the anode connects to the negative side. The cathode is usually marked with a line at one end of the component.
Is a diode an insulator?
No. A diode conducts in one direction but not in the other.
Solid Silver is an album by what rock band?
Solid Silver is an album released by Quicksilver Messenger. The album is one of the band's many popular releases that fit the original group's 'sound.'
Is a 1944 quarter real silver?
You bet. A tip for youto tell difference, just note the difference on the side between that quarter & a modern one. You notice the modern one has a band of copper in it-silver one's (pre-65) lack the band.
