## anonymous 4 years ago Which value of capacitor is more effective as filter element, the larger or smaller and why ?

1. anonymous

What kind of filter?

2. anonymous

Capacitive filter, I want only the reason?

3. anonymous

I would say bigger values of capacitors would be more effective. Since $\ X_L = \frac{1}{2\pi fC}$ where f - frequency and C- capacitance X_c - capacitive reactance (capacitors' opposition to the change in AC voltage) The smaller X_c of the filter capacitor with respect to the load resistance, the better the filtering action. Also, if you have a larger X_c (small C) that means that there will be a bigger voltage drop on that element in the circuit, which you probably don't want.