The role of a choke coil in filtering circuits is to block or limit the flow of high-frequency alternating current (AC) while allowing direct current (DC) or low-frequency AC to pass through. Choke coils are used in filtering circuits to smooth out the output voltage and reduce fluctuations or noise. By acting as an inductor, the choke coil helps in filtering out unwanted high-frequency signals and ensuring a more stable and regulated output.
