So a ac filter doesnt allow the dc component to pass through it, so the dc component would take a altetnative path where as the ac component would easily pass through it. My question is, where is dc component in the input wave?
DC component is the average amplitude over a cycle time period of the signal. So, basically in simple terms you can call the DC component as the bias given to an oscillating signal. For a sinusoidal signal with no bias it would be 0.