How the ferrite bead is used in PCB?

Answer:
There are ferrite beads for PCBs like this
http://image.made-in-china.com/2f0j00NMpaviOdkBul/Ferrite-Beads-Inductor.jpg
First answer by Osamasalah. Last edit by Osamasalah. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 8 [recommend question].