Electrostatics Question 677

Question: The force between two small charged spheres having charges of $ 1\times {{10}^{-7}}C $ and $ 2\times {{10}^{-7}}C $

Options:

A) $ 4.5\times {{10}^{-}}^{2}N $

B) $ 4.5\times {{10}^{-}}^{3}N $

C) $ 5.4\times {{10}^{-2}}N $

D) $ 5.4\times {{10}^{-3}}N $

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Here, $ q _{1}=1\times {{10}^{-7}}C,q _{2} $

and $ 2\times {{10}^{-7}}C, $

$ r=20cm=20\times {{10}^{-2}}m $



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