what does p.c.b stand for when your working with circuits?

You don't give enough information to be positive but I suspect you are referring to polychlorinated biphenyls. Here is a site where you can read more about them.

http://en.wikipedia.org/wiki/Polychlorinated_biphenyls

Or, "printed circuit board."

When working with circuits, PCB stands for "Printed Circuit Board." A Printed Circuit Board is a flat board made of a non-conductive material (such as fiberglass) with electronic components mounted on it. It provides a platform for interconnecting and supporting electronic components, allowing them to function together as a complete circuit.

To find this answer, you can follow these steps:

1. Perform a general internet search: Start by typing your question into a search engine like Google or Bing.

2. Look for reliable sources: Look for reputable websites that specialize in electronics, electrical engineering, or circuit design. These websites often provide accurate and detailed information about circuit components and terminologies.

3. Read the information: Look for articles or resources specifically related to circuits and PCBs. Read through the content to understand the meaning and significance of PCB in the context of circuitry.

By following these steps, you can find reliable sources and gain a better understanding of the term "PCB" in the context of circuits.