B Why do RMS values change during rectification?

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RMS values change during half wave and full wave rectification due to the nature of current flow; in half wave rectification, current only flows for half the cycle, resulting in a lower RMS value. During smoothing, the RMS value can remain constant depending on the type of smoothing used; capacitor input types yield an output voltage equal to the peak AC, while choke input types provide an average output voltage that is slightly lower than the original AC. The RMS voltage represents a DC voltage that delivers the same heating effect, which is affected by the rectification process. In half wave rectification, the mean of the squares is reduced because power is not delivered for half the cycle. Understanding these principles is crucial for analyzing rectified waveforms and their effects on electrical systems.
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Why RMS values change during half wave rectification, full wave rectification? And why does RMS value remain constant during smoothing?
 
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Asad Raza said:
Why RMS values change during half wave rectification, full wave rectification? And why does RMS value remain constant during smoothing?
The RMS voltage of a waveform is equal to a DC voltage providing the same heating effect.
So if we apply half wave rectification to AC, the current flows for only half the time and a DC voltage providing the same heating effect would be lower.
Smoothing can be of two types. If is capacitor input type, the output voltage is equal to the peak AC. Then the RMS value of the output DC is higher than that of the original AC. If it is "choke input type", the output voltage is the average of the input AC, and the RMS value of the output DC is a little lower then the RMS value of the original AC.
 
Asad Raza said:
Why RMS values change during half wave rectification, full wave rectification?
RMS refers to the mean of the squares of the values. Half wave rectification gives zero for half of each cycle so the mean of the squares will be about half. The Power is just not being delivered for half the time.
 

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