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Two point charges each 10-6C are placed at A( i^+j^+k^)m and B(2i^+3j^+3k^)m . The force between those charges is 

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a
1 N
b
10-1 N
c
10-2 N
d
10-3 N

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detailed solution

Correct option is D

The separation between the charges  (2−1)2+(3−1)2+(3−1)2m=3m The force between the charges  F=14πε0q1q2r2=9×109×10−1232=10−3N

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