Electrostatic Potential And Capacitance

Capacitors of are in series, so


Now C' is in paralleI with 2 uf capacitor, so

Electric potential at surface,
V =
=
= Volt

In parallel combination, they will have common potential.
Common potential

Charge on
Charge on
Required ratio =

for
as charge on capacitor increases means P.D. between plates increases.

Potential decreases in the direction of electric field. Dotted
lines are equipotential lines

Let the radius of each small drop is r and the radius of big drop
is R. When 64 small drops of water are combined to form one
big drop, then the volume remains constant. So, the voiume of
64 small drops = the volume of big drop
ie,



Now, the capacitance of a spherical conductor is

[ a is the radius of the conductor]
Now, the .capacitance of small drop

and the capacitance of big drop is

On putting the value of R from E (i), then


On dividing the E (iii) by E (ii)

If we move a charge q from point A to B, then potential
difference
..(i)
volt,
J, q = 4 C
On putting these values in E (i)
V - 10
V - 10 = 5
V = 15 volt