k 9'0 x 109 Nm2C2

1
k 9.0 x 109 Nm2/C2 e0 8.85 x 10-12 C2/(Nm2)
Volume of a cylinder pr2l Surface of a cylinder
2prl Volume of sphere 4/3pr3 Surface of
sphere 4pr2
In general,
For point charges,
and
Electric flux is defined as (this is Gausss law)
Where q is angle between E and the normal to the
surface
In general,
and
and
For point charges,