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What is the effect of load resistance on ripple voltage in presence of filter capacitor?
Wiki User
∙ 13y ago
Ripple voltage, in the presence of a filter capacitor, is inversely proportional to load resistance.
If the load were zero (resistance infinite), then there would be no ripple voltage. As the load increases (resistance decreases), the ripple voltage increases.
The ripple waveform will appear to be sawtooth, with the rising edge following the input AC from the diode's conductioin cycle, and with the falling edge either being linear or logarithmic, depending on load. If the load is resistive, without a regulator, the falling edge will be logarithmic. If the load is constant current, such as with a regulator, the falling edge will be linear.
Wiki User
∙ 13y ago
Wiki User
∙ 7y agoThe higher the load current the higher the ripple voltage across the filter capacitors. It is directly proportional.
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