# What does the arrow going through the battery symbol represent?

I am currently studying Practical Electronics for Inventors, Fourth Edition, by Scherz and Monk. Chapter 2.5 Resistance, Resistivity, and Conductivity presents the following image (without description) when discussing the concept of resistance:

I have the following questions:

1. What does the $$\ A \$$ symbol pointing to the left-hand-side of the Ohmic material represent?
2. What does the arrow going through the battery symbol represent?

I would appreciate it if people would please take the time to clarify this.

• It's a battery of archers! – Hot Licks Jan 26 at 3:45