Question

.A solid body weighing 25 N is placed on the table . The area of contact is 50 sq. cm . Find the pressure exerted on table ?

Answer 1

Answer:

Gauss's theorem states that total electric flux through a closed surface enclosing a charge is 1/ε 0 times of the total charge enclosed by the surface ,

ϕ=Q/ε 0

It is clear that only charge q 2 and q 4

are enclosed by the Gaussian surface therefore only these two charges will contribute to electric flux through the sphere .