There are two non conducting spheres having uniform volume charge densities ρ and −ρ. Both spheres have equal radius R. The spheres are now laid down such that they overlap as shown in the figure. The electric field →E in the overlap region is :
A
non uniform
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B
zero
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C
ρ3ϵ0→d
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D
ρ3ϵ0→r
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Solution
The correct option is B zero The filed lines are directed outward from the surface of sphere for +ρ and inner ward for −ρ.
Thus the electric filed due to +ρ at the over lap region is equal and opposite direction of the filed due to −ρ. So the net electric field is zero in overlap region.