Answer:
33.3 m
Step-by-step explanation:
The relationship between voltage difference and electric field is given by:
![E=(\Delta V)/(d)](https://img.qammunity.org/2020/formulas/physics/college/hq1fo3jxzxei5y98i5colni8682gis9utw.png)
where
E is the electric field strength
is the potential difference
d is the distance between the two points considered
For the lightning, we have:
![\Delta V= 10^8 V\\E= 3\cdot 10^6 V/m](https://img.qammunity.org/2020/formulas/physics/college/havuxrei063vfob7s980v7k0chxrh1xd3v.png)
Substituting into the formula, we find the length of the lightning bolt:
![d=(\Delta V)/(E)=(10^8)/(3\cdot 10^6)=33.3 m](https://img.qammunity.org/2020/formulas/physics/college/sf8f1pf77ogi22wck39v8rp4exzqqllsrn.png)