Two charged particles having charges 1 and \( -1 \mu \mathrm{C} \) and of mass \( 50 \mathrm{~g}...

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Two charged particles having charges 1 and \( -1 \mu \mathrm{C} \) and of mass \( 50 \mathrm{~g} \) each are held at rest while their separation is \( 2 \mathrm{~m} \). Now the charges are released. Find the speed of the particles when their separation is \( 1 \mathrm{~m} \).
(1) \( \frac{1}{5} \mathrm{~ms}^{-1} \)
(2) \( \frac{3}{5} \mathrm{~ms}^{-1} \)
(3) \( \frac{3}{10} \mathrm{~ms}^{-1} \)
(4) \( \frac{2}{7} \mathrm{~ms}^{-1} \)
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