Q.
Two charges each of 1 coulomb are at a distance 1km apart, the force between them is
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a
9×103 Newton
b
9×10−3 Newton
c
1.1×10−4 Newton
d
104 Newton
answer is A.
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Detailed Solution
F=kQ2r2=9×109×12×1(1000)2=9×103N
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