A thin non-conducting ring of radius r has a linear charge density 
, where λ 0 is a constant and 
is the azimuthal angle. The magnitude of the electric field strength at the centre of the ring is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Given, linear charge density of ring 
, and azimuthal angle 
Consider two elements of length 
taken symmetrically at angle 
on both sides as shown in figure.
components get cancelled elementary charge
Resultant field at center of ring due to all charge
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