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Careful measurement of the electric fiel...

Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface of the (a) what ist the net charge inside the box (b) if the net outward flux through the surface of the box wre zero could you conclude that there were no charges inside the box why or why not

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zero the number of lines entering the cube is the same as the number of lines leaving the cube
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Knowledge Check

  • The inward and outward electric flux from a closed surface are respectively 8xx10^(3) and 4xx10^(3) units. Then the net charge inside the closed surface is

    A
    `-4xx10^(3)` coulomb
    B
    `4xx10^(3)` coulomb
    C
    `(-4xx10^(3))/(epsi_(0))` coulomb
    D
    `-4xx10^(3)epsi_(0)` coulomb

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    An electric field is uniform and E=200 hatiNC^(-1) along +x s and E=-200hatiNC^(-1) along -x direction. A right circular cylinder of length 0.20 m and radius 0.05 m has its centre at the origin and its axis along the x-axis so that one face is x=+0.10m and the other =x-0.10m . a. What is the net outward flux through each flat face? b. What is the flux through the side of the cylinder? c. What is the net outward flux throught the cylinder? d. What is the net charge inside the cylinder?

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