A uniformly charged disc of radius R having surface charge density σ is placed in the plane with its center at the origin. Find the electric field intensity along the z-axis at a Z distance from origin :-
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Consider a small ring of r radius and thickness dr on disc.
area of elemental ring on disc
charge on this ring 
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