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A typical diode has a band on one end of the diode. That is considered the positive end. Current is considered to flow from the negative end to the positive end. In power diodes, they can be of two types-- positive polarity and negative polarity. Power diodes are usually designed with one end of the diode to be mounted in a heat sink. Since the desire is to allow current to flow in only one direction, the engineering of the circuit determines which way the current is designed to flow, hence the designation of positive or negative diodes especially for power diodes. A typical car alternator has 3 positive diodes and 3 negative diodes for a total of six.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agodiodes really do not conduct, they actually stop reverse voltage from going backwards on a line. For example say you have a 12 volt solenoid that is triggered by 12 volt supply source. The solenoid or coil is energized by the 12 volts and when switched off the power can reverse in the depletiation mode of losing the 12 volts.Sooo to stop this you put a diode across the coil at the connection to make sure when power is removed no backwards power keeps the solenoid energized.Many years ago there was a company i worked for that forgot to put the diodes across the solenoids and during a power glitch the solenoid energized and stayed on until it melted burning down the drug store which the equipment was located in.hope this helps.
Also let me say this most diodes conduct around .7 volts in one direction but totally block in reverse. Try it out yourself, get a small diode and put a VOM meter across it in OHMS mode.One way it will conduct and the other way it won,t.If you run across a diode that conduicts in both directions it is bad.
Wiki User
∙ 12y agoyes
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Is Light Emitting Diode conduct in both direction?
A light emitting diode does not conduct in both directions.
What is the Principle and operation characteristic of switching diode?
A: The principle is that is a semiconductor meaning will conduct one way only. A switching diode however will have the least of capacitance across its junction so when it disconnect is faster
Why the diode called polarity switch explain?
A diode will only conduct electricity if the polarity of the current is in the correct direction, because diodes can only conduct in one direction.
How does a bridge rectifier operates?
A: must assume an AC source of greater amplitude of .7volts then when the source reaches .7 volts a diode will conduct if the positive voltage is at the anode then it will proceed to go trough the load and return the current to the diode connected to the negative of the source. That basically finishes one half of the cycle when the AC reverses polarity then the same process of current flow will finish the complete cycle. while different series diode conduct one way the other will not conduct because of reverse biasing. but the load will conduct current one way for both cycles
What type of bias causes a diode to conduct?
forward bias
Can a turned around diode conduct electricity?
In one way it will, in the other it won't
Is Light Emitting Diode conduct in both direction?
A light emitting diode does not conduct in both directions.
In which configuration does a diode conduct?
Forward biased is the configuratiuon that a diode conducts.
A diode conducts only when it is?
a diode will conduct when anode is more positive than the cathode
What is the Principle and operation characteristic of switching diode?
A: The principle is that is a semiconductor meaning will conduct one way only. A switching diode however will have the least of capacitance across its junction so when it disconnect is faster
Why the diode called polarity switch explain?
A diode will only conduct electricity if the polarity of the current is in the correct direction, because diodes can only conduct in one direction.
How does a bridge rectifier operates?
A: must assume an AC source of greater amplitude of .7volts then when the source reaches .7 volts a diode will conduct if the positive voltage is at the anode then it will proceed to go trough the load and return the current to the diode connected to the negative of the source. That basically finishes one half of the cycle when the AC reverses polarity then the same process of current flow will finish the complete cycle. while different series diode conduct one way the other will not conduct because of reverse biasing. but the load will conduct current one way for both cycles
What is the negative leg of an LED called?
The side of any diode that must be negative in order for the diode to conduct is the "cathode".
What type of bias causes a diode to conduct?
forward bias
Why does the current travel only one way in a junction dioide?
A diode is a silicon semiconductor meaning it will conduct one way because of the pphysical doping during manufacture
What are or-ing diodes?
A: A diode array that will conduct if anyone of them are hi as in gates
How do you test an hv03-12 high voltage diode?
place the multimeter on the diode. then connect the plobs to the hv diode. it can only conduct in one direction, not both ways. good luck
