Help me please in this homework

[flamur]

How much time we can see the lightning if in crosscut electric energy passes 2500 (ampere) with with load 50C
I=2500A
q=50C
t=? help me please i'll get high grade if i know this

 

[n.karthick]

As you know electric current is rate of flow of charges. i.e.,
$$i= \frac{dq}{dt}$$
From this you can find the time required for flow of given charge as you know the value of current.