For a uniformly charged ring of radius R, the electric field on its axis has the largest magnitude at a distance h from its center. Then value of h is:
A
B
C
R
D
Text Solution
Verified by ExpertsThe correct answer is:
B
JEE Main 2019
Electric field on the axis of a ring of radius R at a distance h from the center,
Condition: for maximum electric field 
By using the concept of maxima and minima we get,
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