Advertisements
Advertisements
प्रश्न
Define electric flux.
Define electric flux. Is it a scalar or a vector quantity?
Advertisements
उत्तर १
Electric flux is the total number of lines of force passing through the unit area of a surface held perpendicularly.
Electric flux ΔΦ through an area element ΔS is given by
ΔΦ = E.ΔS = EΔScosθ
θ is the angle between E and ΔS.
उत्तर २
Electric flux is defined as the number of electric field lines crossing the per unit area. It is given as
`triangle phi = vecE.vec(triangleS) cos theta`
where `vecE` is Electric field and `vec(triangleS)`is area vector. The angle θ here is the angle between `vecE` and `vec(triangle S)`.
Since Electric flux is the dot product of two vectors, Hence it is a Scalar quantity.
APPEARS IN
संबंधित प्रश्न
What is the electric flux through a cube of side 1 cm which encloses an electric dipole?
A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 μC/m2.
- Find the charge on the sphere.
- What is the total electric flux leaving the surface of the sphere?
A thin straight infinitely long conducting wire having charge density λ is enclosed by a cylindrical surface of radius r and length l, its axis coinciding with the length of the wire. Find the expression for the electric flux through the surface of the cylinder.
A charge q is placed at the centre of the open end of a cylindrical vessel (see the figure). The flux of the electric field through the surface of the vessel is ____________ .
If the flux of the electric field through a closed surface is zero,
(a) the electric field must be zero everywhere on the surface
(b) the electric field may be zero everywhere on the surface
(c) the charge inside the surface must be zero
(d) the charge in the vicinity of the surface must be zero
The electric flux through a closed Gaussian surface depends upon ______.
A charged particle q is placed at the centre O of cube of length L (A B C D E F G H). Another same charge q is placed at a distance L from O. Then the electric flux through ABCD is ______.
What will be the total flux through the faces of the cube (figure) with side of length a if a charge q is placed at
- A: a corner of the cube.
- B: mid-point of an edge of the cube.
- C: centre of a face of the cube.
- D: mid-point of B and C.
An electric field is given by `(6 hat i + 5 hat j + 3 hat k)` N/C. The electric flux through a surface area `30 hat i` m2 lying in YZ-plane (in SI unit) is ______.
