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Pls give a solution of it as i am unable to get the write ans this question

Pls give a solution of it as i am unable to get the write ans this question

Question Image

3 Answers

25763 Points
one year ago
Dear student
Please attach clear image. I will be happy to help you.
Hope you understand
Thanks and regards
58 Points
one year ago
In this case, you’ve to take spherical element at distance r and using gauss theorem, you’ll find that for r1
E due to charge distribution  = k*q*(1/(r1)^2 – 1/(r)^2) so when you add the electric field due to charge inside cavity the net E will remain constant for that region. For rr2 it’ll be acting like an E due to charge particle 
hence option B
pls approve if it helps
120 Points
one year ago
Friend , the image is clear .
The correct option will be option B.
For any point outside the sphere , X>R2 . The whole charge can be assumed to be at centre and then electric field at an outer point will be kQnet /r². And the graph will be hyperbolic for distance greater than R2.
For X less than R2 but greater than R1,
The charge density is not uniform and density = dQ/dV
dV is 4πr² Dr.
By this you you can find equation of charge varying with radius Q directly proportional to r².
The electric field is kq/r² and will be constant for this region.
Now third case , for an inside point apply guass law  the charge is kept at centre due to which the graph again be hyperbolic.
Hope you understood.kindly approve

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