Question

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Updated on : 2022-09-05

Solution

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Correct option is B)

Formulae:

$σ_{big}σ_{small} =Qq ×r_{2}R_{2} $

$=nqq ×r_{2}(n_{31}r)_{2} $

$=n_{−31}$

$=64_{−31}$

$=41 $

hence the ratio is $1:4$

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