electric flux through a close surface is (a) scaler quantity (b) vector quantity (c) tensor quantity (c) none of above
Answers
Explanation:
please follow me
search
What would you like to ask?
12th
Physics
Electric Charges and Fields
Gauss Law and Problems Based on it
(a) Define electric flux. I...
PHYSICS
avatar
Asked on October 15, 2019 by
Yusuf Deokar
(a) Define electric flux. Is it a scalar or a vector quantity?
A point charge q is at a distance of d/2 directly above the centre of a square of side d, as shown in the figure. Use Gauss' law to obtain the expression for the electric flux through the square.
(b) If the point charge is now moved to a distance
′
d
′
from the centre of the square and the side of the square is doubled, explain how the electric flux will be affected.
question
MEDIUM
Share
Study later
ANSWER
a) Electric flux is a flow of electric field through a given area.
It is a scalar quantity.
Suppose a cube enclosing the charge q of side d. One of the faces of the cube is the square as given in the figure.
Hence according to Gauss's law, the electric flux through the cube is
ϵ
o
q
From symmetry, the flux through the face is 1/6 th of the flux through the cube.
hence flux through the face =
6ϵ
o
q
b)
In this case suppose the cube be of side 2d.
According to a similar analysis as shown in the part 1 the elctric flux through the face is :
6ϵ
o
q
Hence there will be no change in the electric flux.
As it's a count of line no what it's going through so it's obvious that it is scalar