In the diagram, what does the symbol 'x' represent and what does the symbol '.' represent?

Analysis of Symbols:

In the context of electromagnetism diagrams:

• The symbol 'x' typically represents a magnetic field directed into the page (like the tail of an arrow).
• The symbol '.' (a dot within a circle) typically represents a magnetic field directed out of the page (like the tip of an arrow).

Conclusion: The symbol 'x' represents a magnetic field directed into the page, and the symbol '.' represents a magnetic field directed out of the page.