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Q.

Two positively charged particles each of mass 1.7×10–27 kg and carrying a charge of 1.6×10–19C are placed r distance apart. If each one experience a repulsive force equal to its weight. Find the distance between them.

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a

117 m

b

11.7 cm

c

117 cm

d

1.17 m

answer is C.

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Detailed Solution

F=mg9×109×1.6×10−192r2=1.7×10−27×9.8⇒r2=1.6×10−192×9×1091.7×10−27×9.8⇒r=11.7×10−2m⇒r=11.7cm

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