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A particle of mass m and charge -q moves...

A particle of mass `m` and charge `-q` moves along a diameter of a uniformly charged sphere of radius `R ` and carrying a total charge ` +Q`. Find the frequency of S.H.M. of the particle if the amplitude does not exceed `R` .

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The correct Answer is:
`[(1)/(2pi) sqrt((qQ)/(4 pi in_(0)mR^(3)))]`
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PHYSICS GALAXY - ASHISH ARORA-ELECTROSTATICS-Unsolved Numberical Problems
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  14. A particle of mass m and charge -q moves along a diameter of a uniform...

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  18. A solid sphere ofradius 'R' is uniformly charged with charge density r...

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