Advertisements
Advertisements
प्रश्न
Define electric flux.
Define electric flux. Is it a scalar or a vector quantity?
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
Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the box is 8.0 × 103 N m2/C.
- What is the net charge inside the box?
- If the net outward flux through the surface of the box were zero, could you conclude that there were no charges inside the box? Why or Why not?
Given a uniform electric filed \[\vec{E} = 4 \times {10}^3 \ \hat{i} N/C\]. Find the flux of this field through a square of 5 cm on a side whose plane is parallel to the Y-Z plane. What would be the flux through the same square if the plane makes a 30° angle with the x-axis?
Two charges of magnitudes −2Q and +Q are located at points (a, 0) and (4a, 0) respectively. What is the electric flux due to these charges through a sphere of radius ‘3a’ with its centre at the origin?
The electric flux through the surface ______.
 |
 |
 |
 |
| (i) | (ii) | (iii) | (iv) |
A cylinder of radius R and length L is placed in a uniform electric field E parallel to the cylinder axis. The total flux for the surface of the cylinder is given by ______.
A point charge q is placed at a distance a/2 directly above the centre of a square of side a. The electric flux through the square is ______.
A charge Qµc is placed at the centre of a cube the flux coming from any surface will be.
A hollow sphere of radius R has a point charge Q at its centre. Electric flux emanating from it is `phi`. If both the charge and the radius of the sphere are doubled, electric flux emanating from the sphere will ______.
