Physics-
General
Easy
Question
A hollow conducting sphere of inner radius R and outer radius 2R has resistivity '
' a function of the distance 'r' from the centre of the sphere: 
. The inner and outer surfaces are painted with a perfectly conducting 'paint' and a potential difference 
is applied between the two surfaces. Then, as 'r' increases from R to 2R, the electric field inside the sphere
- increases
- decreases
- remains constant
- passes through a maxima
The correct answer is: increases
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