Two particles \( A \) and \( B \) ( \( B \) is right of \( A \) ) having charges \( 8 \times 10^...

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Two particles \( A \) and \( B \) ( \( B \) is right of \( A \) ) having charges \( 8 \times 10^{-6} \mathrm{C} \) and \( -2 \times 10^{-6} \mathrm{C} \), respectively, are held fixed with separation of \( 20 \mathrm{~cm} \). Where should a third charged particle be placed so that it does not experience a net electric force?
(1) \( 5 \mathrm{~cm} \) right of \( B \)
(2) \( 5 \mathrm{~cm} \) left of \( A \)
(3) \( 20 \mathrm{~cm} \) left of \( A \)
(4) \( 20 \mathrm{~cm} \) right of \( B \)
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