Current density describes the amount of current concentrated under an electrode and is a measure of the quantity of charged particles moving through a specific cross-sectional area of body tissue. What is the relationship between electrode surface area and total current flow?
a. Direct relationship - as electrode surface area increases, total current flow increases
b. Inverse relationship - as electrode surface area increases, total current flow decreases
c. No relationship - electrode surface area does not affect total current flow
d. Non-linear relationship - the relationship between electrode surface area and total current flow is not easily predictable