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What is a function of a rectifier?

Answer:

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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