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A Diode is a device which allows current to flow only in one direction (see forward bias).
Since a rectifier needs to convert Alternating current(bi-directional) into Direct current(uni-directional), solid-state diodes are usually used as rectifiers.
Wiki User
∙ 15y ago
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∙ 14y agoA simple diode blocks the flow of electrons in one direction while allowing comparatively little resistance in the other direction.
This is capable of taking a simple A.C. wave and chopping half away. The resulting current flows in only one direction. (pulsating D.C.) You remove pulses capacitors are added to make pure D.C.
Changing A.C. into pulsating D.C. is called rectification.
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∙ 13y agoOnly the voltage that the diode allows is present. If you combine diodes cathodes together, their anodes separately (correctly) connected to a Transformers output wires, there will be Positive D.C. at that junction. Majority current flows in one direction. A small fraction does flow the other way ( minority carriers), but they work well enough.
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∙ 12y agoThere are two ways to achieve full wave rectification. One using two diodes, the other using four.
A transformer secondary winding with a centre tap needs two diodes, one from each of the winding's outer connections, both diodes having either their cathodes or their anodes connected to the transformer, depending on whether a positive or negative voltage is required.
The other ends of the diodes, either both anodes or both cathodes are connected together and that will be either the positive or negative side of the d.c.
The other side of the d.c. will be from the transformer's centre tap.
A simple transformer secondary, with no centre tap, will require four diodes connected in the "bridge" configuration.
The a.c. is connected across the two opposite points in the bridge where a cathode is connected to an anode.
The rectified d.c. is taken from the two remaining opposite points, one where two anodes are connected together (the negative) and the other where two cathodes are connected together (the positive).
Wiki User
∙ 11y agoOh;The diodes / rectifiers / are used as a rectification or changing process of voltage or the power of electric i.e. the diodes what they gain it up in the process of rectification / changing / and multiplied from 12volt to 10,000 30,000,50,000, 100,000 etc ... according to the winding of the alternator or dynamo type too.
Hence the diodes have contributed the basic and key roll in the process of multiplying the power .
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∙ 14y agoSemiconductor diode is use for gating of electrical current (current flow in one direct only)
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∙ 11y agoA junction formed between a sample of p-type and n-type semiconductor, possesses property of a
Wiki User
∙ 11y agoa full wave rectifier
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What is the difference between limiting and clamping circuit?
A diode-clipping circuit is used to skip some portion of the signal (e.g. the half way/full way rectifiers rectify the '-ve' or '+ve' part of the signal). A diode-clamping circuit is used to add some signals to the original signal.
What are the applications of precision rectifiers?
Precision rectifiers are used in the design of instrumentation systems.
Difference between 1N4007 and 1N4005 diode?
THE 1n4000 series are classified as rectifiers for low frequency use having a big capacitance at the junction the other are diodes that have a very small capacitance therefore a quick disconnect time from conducting to off.
Why not stepup transformer is not used in rectifiers?
Rectifiers turn A/C into D/C, but transformers can only run on A/C.
Why are silicon diodes not suited for low voltage rectifiers?
Silicon diodes ARE used in reverse bias. This is the mode in which they do not conduct, which is the principal role of a diode. When forward biased, a silicon diode will conduct but has a voltage drop of around 0.6v so is not useful for rectifying small voltages (unless used as a perfect diode with an op amp).
Are diodes rectifiers?
No. Diodes are diodes. One diode can be USED as a half-wave rectifier. Four diodes can be used to build a bridge rectifier.
What is the use of PN diode?
there are many uses. one major use i remember is in rectification i.e convert ac to dc For switch operation
WHAT IS rectifiers 1N4007?
The 1N4007 is a diode with forward current rating of 1 ampere, and a reverse voltage rating of 1,000 volts.
What is the difference between limiting and clamping circuit?
A diode-clipping circuit is used to skip some portion of the signal (e.g. the half way/full way rectifiers rectify the '-ve' or '+ve' part of the signal). A diode-clamping circuit is used to add some signals to the original signal.
What are the applications of precision rectifiers?
Precision rectifiers are used in the design of instrumentation systems.
Function of diode?
While there are many other uses for diodes, they are used mainly as rectifiers. Their ability to conduct electric current in only one direction allows them to be used to convert (rectify) alternating current to direct current.
Is fans used in rectifiers?
no
Why diode is small in size?
This fundamental item in electronics is very simple, and most do not need a large size. But mercury arc rectifiers occupy a good part of a m^3. Thyristor rectifiers as used on HVDC grids, where the voltage may be +/- 250kV, and the power many MW, need some space to dissipate their heat.
How is AC converted to DC and does it change the power an item would have?
you basically use rectifiers..like zener diode rectifier and full bridge rectifier..
Can a diode be used as rectifier diode?
yes, diode can be used as rectifier diode to convert ac to dc
Difference between 1N4007 and 1N4005 diode?
THE 1n4000 series are classified as rectifiers for low frequency use having a big capacitance at the junction the other are diodes that have a very small capacitance therefore a quick disconnect time from conducting to off.
Why not stepup transformer is not used in rectifiers?
Rectifiers turn A/C into D/C, but transformers can only run on A/C.
