The Rectifier is an electronic device, which converts an AC waveform(Usually a Bi-directional waveform with Zero Average value) to a Pulsating DC waveform (Uni-directional waveform with Nonzero Average value).
As AC wave (Sinusoidal) has two half cycles, namely -
Positive Half cycle & Negative Half cycle
If a Rectifier does it's operation only in one half of the cycles, it is known as Half Wave Rectifier.
Similarly, If a Rectifier does it's operation in both the half cycles, it is known as Full Wave Rectifier.
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In a simple half-wave rectifier, during the positive part of the alternating wave the diode conducts, making the load voltage equal to the supply voltage. During the negative …part of the alternating wave he diode blocks, making the load voltage zero. Another explanation For as long as its circuit is alive, any sine wave signal running at a certain frequency has the positive part of its wave immediately followed by the negative part of its wave immediately followed by another positive part of its wave, and so on. A half-wave rectifier would basically eliminate the negative part so the output of the rectifier, as seen by the load that is connected to it, would receive a positive half wave voltage then a zero voltage during the negative half cycle of the waveform, then a positive half cycle again, and so forth. A full wave rectifier does the same thing for the positive half of the cycle and then basically flips the negative part of the waveform to give the same output as the positive part, so you have a series of positive pulses. The signal, as seen by the load after the rectifier, never goes negative.(MORE)
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Imagine a rectifier as a valve that only allows electrical current to flow in one direction. When using a single rectifier you end up with half of the wave cycle being cut off… (when the cycle turns negative). In many applications a full wave rectifier would be far more desirable. By configuring four of the rectifiers it is possible to make what's called a full wave "bridge". The link below shows how a full wave bridge works. http://hyperphysics.phy-astr.gsu.edu/Hbase/electronic/rectbr.htmlANSWER: It will rectify the input into pulsating DC of twice the input frequency minus two diodes drop 1.4 volts(MORE)
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