# In the return stroke of a typical lightning bolt 2

In the return stroke of a typical lightning bolt, a current of $2.5\times 10^4$ A exists for 20 μs. How much charge is transferred in this event?

#### Solution:

We can use the following equation to figure out the charge transferred.

$q=it$

(Where $q$ is charge, $i$ is the current, and $t$ is the time)

Substitute the values we know.

$q=(2.5\times 10^4)(20\times 10^{-6})$

$q=0.5$ C

$q=0.5$ C