KVPY SB SX Exam 2011 Question Paper

Question : 91 of 120

Marks: +1, -0

PHYSICS

An isolated sphere of radius R contains uniform volume distribution of positive charge. Which of the curves shown below correctly illustrates the dependence of the magnitude of the electric field of the sphere as a function of the distance r from its centre?

Validate

Solution:

When r < R,

E={ \ρr}/{3∈_0}

When r > R,

E={ Q}/{4π∈_0r^2}

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