Possible consequences of increasing the filter capacitance
What is / are the possible consequences of increasing the filter capacitance?
a. Reduction in magnitude of ripple voltage
b. Reduction in peak current of diode
c. Reduction in Vdc towards the limiting value Vip
d. All of the above
Correct Answer: a. Reduction in magnitude of ripple voltage
Basically, a capacitor opposes the change in voltage.The main function of filter circuit is to convert a pulsating output from a rectifier into a steady dc level since it smoothens out the pulstations at the output.
A bigger capacitor is more likely to minimize the content or magnitude of ripple voltage.
With an increase in capacitor size, the peak current in the diode and dc voltage towards its limiting value also increases whereas magnitude of ripple voltage along with the time of flow current pulse in the diode goes on decreasing.