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A sphere of radius R has a volume density of charge p=kr where r distance from the centre of the sphere and k is constant the magnitude of the electric field which exist at the surface of the sphere is given by (epsilon eo=permittivity of free space
a)4πkR'4/3eo
b)kR/3eo
c) 4πkR/eo
d) kR'2/4eo

shumaila shuaib , 5 Years ago
Grade 12
anser 2 Answers
chetan jangir

Last Activity: 5 Years ago

Hi dear, Answer must be D.
Calculate the within sphere that from center to disatnce R and then apply formula E=kq/r^2
 

Yashraj

Last Activity: 5 Years ago

assume a elemental hollow sphere and calculate the total charge 
which will be 
kR4
and apply guass law assuming spherical urface of radius r around sphere
 
nice question the game is integration

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