Three charges are placed at the vertices of an equilateral triangle of side ‘$a$’ as shown in the following figure. The force experienced by the charge placed at the vertex $A$ in a direction normal to $BC$ is

109-51

  • [AIIMS 2003]
  • A

    ${Q^2}/(4\pi {\varepsilon _0}{a^2})$

  • B

    $ - {Q^2}/(4\pi {\varepsilon _0}{a^2})$

  • C

    Zero

  • D

    ${Q^2}/(2\pi {\varepsilon _0}{a^2})$

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