Is there a capacitance between the Earth and the Moon, and if there was enough potential difference, could a discharge strike occur?
Answer
The capacitance between two plates varies as:
C=eAd
in which $d$ is the distance between the plates, $A$ is the area of the plates and $e$ is the Coulomb constant. e=8.9×10−12
Distance from earth to moon: d=4×108 meter
Approximate equivalent earth surface: A=(1.28×104)2
Therefore, C=8.9×10−12×1.64×1084×108=2.39×10−11=10 pF
The numbers were truncated to the nearest the third place.
No comments:
Post a Comment