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What is a diode?
Diode is a two terminal device (di- means "two"). Simply put, it acts as a one-way valve for electrons. Conventional current can flow from the anode to the cathode, but not in… the other direction. If an intrinsic semiconductor is doped with a pentavalent or trivalent impurities you get a diode. A diode is formed when a region of N-type semiconductor touches a section of P-type. In the N-type region electrons are the majority carriers and in the P-type electron "holes" are the majority carriers. If forward-biased (applying a positive voltage to the P region and a negative voltage to the N region), the depletion region of the diode decreases. The electrons on the N side are repelled and they move towards the P side thus reducing the size of the depletion layer. If reverse-biased, the depletion region increases because the electrons are attracted towards the positive voltage and the holes are attracted towards the negative voltage, and hence the current gets reduced and the current flowing will be very small, on the order of microamps. This is called as reverse saturation current. Although an ideal diode acts like a switch and it is a useful approximation, real diodes are not ideal: a real diode has other properties that are sometimes useful and sometimes a drawback. For example, a real diode requires some forward voltage to turn on, usually around 0.3-0.6 volts, depending on the type. Also a reverse-biased diode can act like a variable capacitor, which can be used to make voltage controlled oscillators and tuning filters. Reverse-biased diodes (voltage applied so they turn off) will eventually break down if enough reverse voltage is applied, and allow current to flow. This is used to make Zener diodes that breakdown at a specific voltage, useful in voltage regulation.
A diode is a semiconductor meaning it will conduct from anode to cathode if the anode is held positive. Reversing the polarity Will in effect block current flow.
A diode modulator is a type of AM modulator constructed using diodes. One type of diode modulator is the ring modulator shown in the image.
Answer A diode is used to control current flow in a circuit A diode has a very high resistance to current flow in one direction and a very low resistance to cu…rrent flow in the opposite direction
Diode is a two terminal semicon. Diode is a Switching device
what is diod
my understanding of the term diode fuse is a diode that fits into a circuit the same as a fuse does for ease of replacement the ones i have used are the same shape as a two pr…ong car fuse and fit the same type holder it makes it very easy to locate broken diodes as they are located in a fuse box and can be remove without tools
Diode is a pn junction device which conducts (current flow)in forward direction. Zener diode is a device in which current flows in forward direction as well as in reverse di…rection.For a Zener diode,current flows in reverse direction if the voltage is larger than the breakdown voltage,where the breakdown voltage is the minimum reverse voltage to make the diode conduct in reverse.
A: a semiconductor conducts one way only
diode:= di+ iode di means two,and iode means terminal,,,, diode is two terminal device i.e anode and cathode
A diode is a semiconductor device that passes current in one direction only. Sometimes, in the case of zener diodes, it conducts in both directions, but at a different voltage… in the reverse direction. Diodes can be used for...Rectifiers, to convert AC to DCAuctioneering/Isolation, where one of two sources can supply the load, but those sources must not interfere with each otherVoltage reference, particularly for zenersClipping, in order to narrow the voltage range of a signalDetection, in order to demodulate a signal from a carrierMixing, in order to mix an RF signal with a Local Oscillator in the superhetrodyne receiver There are other uses - this list is only a sample
The Diode Check setting on a DVOM is a special ohms setting that presents enough voltage to the tested device to conduct, if it were a diode. Old style VOM's did not have this… problem, because they usually used a battery greater than 0.7 volts to run the ohm's scale. Modern DVOM's, however, can use very small voltages to measure ohms, and that would not cause a diode to conduct. The Diode Check setting fixes this limitation.
Today, all diodes are semiconductor diodes. However, the first diodes were piles of washers of different metals that together made a diode, and specially constructed vacuum tu…bes. There may still be markets for other types of diodes in very high voltage circuits, but you or i are unlikely to come in contact with them.
because two semiconductors are there.....P and N
yes, diode can be used as rectifier diode to convert ac to dc
a device that conducts in only one direction
Diodes are electronic components with a variety of applications, depending on their concrete design and principle. A free-wheeling diode, for example, is used to allow current… to flow only in one direction within an electrical circuit. There are other types of diodes like laser diodes, light emitting diodes (LEDs), photo diodes, tunnel diodes and many others.