Why diode is used in rectifiers?

Answer 1

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.

Answer 2

A 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.

Answer 3

Only 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.

Answer 4

There 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).

Answer 5

Oh;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 .

Answer 6

Semiconductor diode is use for gating of electrical current (current flow in one direct only)

Answer 7

A junction formed between a sample of p-type and n-type semiconductor, possesses property of a

Answer 8

a full wave rectifier