A charged particle having some mass is resting in equilibrium at a height `H` above the centre of a uniformly charged non-conducting horizontal ring of radius ` R`. The equilibrium of the particle will be stable .A. for all values of HB. only if ` H gt (R)/(sqrt2)`C. only if ` H lt (R)/(sqrt2)`D. only if ` H = (R)/(sqrt2)`

A charged particle having some mass is resting in equilibrium at a hei

1.	A charged particle having some mass is resting in equilibrium at a height `H` above the centre of a uniformly charged non-conducting horizontal ring of radius ` R`. The equilibrium of the particle will be stable .A. for all values of HB. only if ` H gt (R)/(sqrt2)`C. only if ` H lt (R)/(sqrt2)`D. only if ` H = (R)/(sqrt2)`
Answer» Correct Answer - B Since electric field due to ring will be maximum at ` H = R/(sqrt 20`.

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