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:

Show me the final answer↓

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

#### Final Answer:

q=0.5 C

Wouldn’t 20MuSeconds be 2.0*10^-5?

Umm, 20*10^-6 and 2*10^-5 is the same number? 🙂