#### I will Explain You With A simple Mathematics.

#### Remind Capacitance Reactance Equation,

Xc=1ωC=12πfC

#### If You Take Any Capacitor, Than Its Value Is Fixed.

### Why Does A Capacitor Block DC?

#### Now Assume you Connect your capacitor to a DC source. Now DC current has no frequency,

#### We Can Say, f=0

#### Put This Value In Capacitance Reactance Equation,

XcXc