Question

What is the current when a typical static charge of 0.234~\mu\text{c}0.234 μc moves from your finger to a metal doorknob in 0.595~\mu\text{s}0.595 μs?

Answer 1

The current is defined as the quantity of charge Q that passes through a certain location in a time
`\Delta t`:

`I= (Q)/(\Delta t)`
Using the data of the problem, we find:

`I= (Q)/(\Delta t) = (0.234 \mu C)/(0.595 \mu s)=(0.234\cdot 10^(-6) C)/(0.595 \cdot 10^(-6) s)=0.39 A`