1.

Two charges each of \[1\ coulomb\]are at a distance \[1\,km\] apart, the force between them is   [CPMT 1977; DPMT 1999]

A.         \[9\times {{10}^{3}}\ Newton\]
B.          \[9\times {{10}^{-3}}\ Newton\]           
C.          \[1.1\times {{10}^{-4}}\ Newton\]       
D.          \[{{10}^{4}}\ Newton\]
Answer» B.          \[9\times {{10}^{-3}}\ Newton\]           


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