Question

In a uniformly charged sphere of total charge Q and radius R, the electric field E is plotted as a function of distance r from the centre. Which graph correctly represents this variation? 

• A. A
• B. B
• C. C
• D. D

Hint:

Uniformly charged sphere: linear rise inside, inverse square fall outside.

Answer 1

The Correct Option is C

Step 1: Field inside the sphere. Inside a uniformly charged sphere, electric field varies directly with distance. E r
Step 2: Field outside the sphere. Outside the sphere, electric field behaves like that of a point charge. E (1)/(r²)
Step 3: Graph interpretation. The field increases linearly till R and then decreases as 1/r².