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When an $α$ -particle of mass m moving with velocity $v$ bombards on a heavy nucleus of charge $Z e$ , its distance of closest approach from the nucleus depends on $m$ as

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Correct option is C

Distance of closest approach when an α -particle of mass m moving with velocity V is bombarded on a heavy nucleus of charge ze, is given byr0=Ze2πε0mv2 ∴ r0∝1m

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When an α -particle of mass m moving with velocity v bombards on a heavy nucleus of charge Ze, its distance of closest approach from the nucleus depends on m as

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When an $α$ -particle of mass m moving with velocity $v$ bombards on a heavy nucleus of charge $Z e$ , its distance of closest approach from the nucleus depends on $m$ as