Two identical charged particles each having a mass $10 \mathrm{g}$ and charge $2.0\times {10}^{-7}\mathrm{C}$ are placed on a horizontal table with a separation of $L$ between them such that they stay in limited equilibrium. If the coefficient of friction between each particle and the table is $0.25$, find the value of $L$. [Use $\mathrm{g}=10{ \mathrm{ms}}^{-2}$ ]

• Correct answer
  A

  $12 \mathrm{cm}$
• B

  $10 \mathrm{cm}$
• C

  $8 \mathrm{cm}$
• D

  $5 \mathrm{cm}$

Hence, the correct answer is option: 'A'.