A charged particle ' \( \mathrm{q} \) ' is shot from a large distance with speed \( v \) towards....

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A charged particle ' \( \mathrm{q} \) ' is shot from a large distance with speed \( v \) towards a fixed charged particle \( Q \). It
\( \mathrm{P} \)
approaches \( Q \) upto a closest distance \( r \) and then returns. If \( \mathrm{q} \) were given a speed ' \( 2 \mathrm{v} \) ', the closest
W
distance of approach is \( \frac{n r}{8} \) then \( n \) will be:


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