Electric Flux

IMPORTANT

Electric Flux: Overview

This Topic covers sub-topics such as Electric Flux

Important Questions on Electric Flux

EASY
IMPORTANT

The SI unit of electrical flux is:

HARD
IMPORTANT

The electric field components due to a charge inside the cube of side 0.1 m are as shown:

  E x =αx , where  α=500 N C-1m-1

  E y =0, E z =0 .

Calculate (i) the flux through the cube, and (ii) the charge inside the cube.

EASY
IMPORTANT

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

HARD
IMPORTANT

Figure shows, in cross section, two Gaussian spheres and two Gaussian cubes that are centered on a positively charged particle. Select the correct alternatives.

     

MEDIUM
IMPORTANT

In the figure, a hemispherical bowl of radius R is shown. Electric field of intensity E is represented in each situation by direction lines.

EASY
IMPORTANT

A positive point charge Q is placed (on the axis of the disc) at a distance of 4R above the center of a disc of radius R as shown in situation I. The magnitude of electric flux through the disc is ϕ. Now, a hemispherical shell of a radius R is placed over the disc such that it forms a closed surface as shown in situation II. The flux through the curved surface in the situation II taking direction of area vector along outward normal as positive is

  

EASY
IMPORTANT

The flux entering and leaving a closed surface are 400 Nm2/C and 800 Nm2/C respectively. Net charge enclosed by this surface in nC is 

MEDIUM
IMPORTANT

In a region of space having a spherically symmetric distribution of charge, the electric flux enclosed by a concentric spherical Gaussian surface varies with a radius r as 
ϕ=ϕ0r2R3,rRϕ0,r>R where R and ϕ0 are the constants.

The electric field strength in the region is given as, 

EASY
IMPORTANT

Which one is the SI unit of electric flux

MEDIUM
IMPORTANT

A large uniformly charged sheet having a surface charge density of 5×10-16 C/m2 lies in X-Y plane. Calculate the electric flux through a circular loop of radius 0.1 m, whose axis makes on angle of 60° with Z axis.

MEDIUM
IMPORTANT

Consider a cube of side a. Let a charge q be placed at centre. Calculate the total flux linked with cube and flux linked with each face.

MEDIUM
IMPORTANT

Explain the term electric flux. Write its SI unit and dimensions.

EASY
IMPORTANT

When does the electric flux through an area element placed in an electric field E is zero ?

EASY
IMPORTANT

A square in a horizontal orientation is situated in a uniform horizontal electric field such that a line drawn in the plane of square makes angle of 300 with electric field. If side of square is a then flux through the square will be 

EASY
IMPORTANT

400 lines of force (M.K.S. unit) are entering (M.K.S.units) inwards while 200 lines of force (M.K.S. unit) going outwards from the surface then the total value of charge confined to the surface will be

 

EASY
IMPORTANT

The net flux passing through the surface of an imaginary cube of edge length a placed in space having a uniform volume charge density, is ϕ. The net flux passing through the surface of an imaginary sphere of radius a in the same space is

EASY
IMPORTANT

The net flux passing through the surface of an imaginary cube of side a in the space (Charge is uniformly distributed in a space) is ϕ.Find the net flux passing through the surface of an imaginary sphere of radius a in the space ?

MEDIUM
IMPORTANT

Find the maximum flux through the sphere if a ring of radius R having a linear charge density λ moves towards a solid imaginary sphere of radius R2, such that the centre of ring passes through the centre of sphere. The axis of the ring is perpendicular to the line joining the centres of the ring and the sphere.


HARD
IMPORTANT

If distance x and radius R are doubled so that FA becomes F'AFBbecomes F'B then the correct option is:

HARD
IMPORTANT

If ϕ1 is flux through surface of (B) due to electric field of (A) and ϕ2 be the flux through (A) due to electric field of (B) then: