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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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Careful measurement of the electric field at the surface of a black box indicates that the net outward flux through the surface ofthe box is 8.0x10^3Nm^2//C . What is the net charge inside the box ?

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 xx 10^(3)N*m^(2)*C^(-1) . (a) What is the net charge inside the box? (b) If the net outward flux through the surface of the box where zero, could you conclude that there where no charges inside the box? Why or why not ?

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Due to the presence of a charge at the centre of a sphere of radius 10 cm, the electric flux passing through the surface of the sphere is -6xx10^(3)N.m^(2).C^(-1) . (i) What is the magnitude of charge inside the sphere? (ii) If a concentric spherical Gaussian surface with a radius double that of that of the sphere is taken, what will be the amount of electric flux now passing through this surface?

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NCERT BANGLISH-ELECTRIC CHARGES AND FIELDS -EXERCISES
  1. (a) Two insulated charged copper spheres a and b have their centres ...

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  2. Track of three charged particles in a uniform electroastatic field ...

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  3. Consider a uniform electric field E=3xx10^(3) hati N/C (a) what is ...

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  4. What is the net flux of the uniform electric field of exercise th...

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  5. Careful measurement of the electric field at the surface of a black b...

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  6. A point charge + mu c is a distance 5 cm directly above the centre of...

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  7. A point charge of 2.0 mu c is at the centre of a cubic gaussian ...

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  8. A point charge causes an elelctric flux of -1.0 xx10^(3) Nm^(2) /C to...

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  9. A conducting sphere of radius 10 cm has an unknown charge if the elect...

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  10. A uniformly charged conducting sphere of 2.4 m diameter has a surface ...

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  11. An infinite line charge produces a field of 9xx10^(4) N/C at a dis...

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  12. Two large thin metal plates are parallel and close to each other on...

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  13. An oil drop of 12 exess electrons is held stationary under a consta...

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  14. Which among the curves cannot possibly represent electrostatic fie...

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  15. In a certain region of space electric field is along the z direction...

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  16. (a) a conductor a with a cavity given a charge Q show that the enti...

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  17. A hollow charged conductor has a tiny hole cut in to its surface sho...

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  18. Obtain the formula for the electric field due to a long thin wire ...

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  19. It is now established that protons and neutrons are themselves bui...

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  20. (a) consider an arbitrary electrostic field configuration a small tes...

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