Question

The figure shows two large, closely parallel, nonconducting sheets with identical (positive) uniform surface charge densities and a sphere with a uniform (positive) volume charge density. Four points marked as `1,2,3` and 4 are shown in the space in between. If `E_(1),E_(2),E_(3)` and `E_(4)` are magnitude of net electric fields at these points respectively then :

A. `E_(1) gt E_(2) gt E_(3) gt E_(4)`
B. `E_(1) gt E_(2) gt E_(3) = E_(4)`
C. `E_(3) = E_(4) gt E_(2) gt E_(1)`
D. `E_(1) = E_(2) = E_(3) = E_(4)`

Answer 1

Correct Answer - C

Electric field due to both the plates will be cancelled out for all the points. So the net electric field at the points will be governed only by the sphere, Farther the point from the sphere, lesser the magnitude of electric field. Therefore `E_(3) = E_(4) gt E_(2) gt E_(1)`.