Electrostatics Question 200

Question: Two electrons are separated by a distance of 1Å. What is the coulomb force between them [MH CET 2002]

Options:

A) $ 2.3\times {{10}^{-8}} $ N

B) $ 4.6\times {{10}^{-8}} $ N

C) $ 1.5\times {{10}^{-8}} $ N

D) None of these

Show Answer

Answer:

Correct Answer: A

Solution:

$ F=9\times 10^{9}\times \frac{Q^{2}}{r^{2}} $

$ =9\times 19^{9}\times \frac{{{(1.6\times {{10}^{-19}})}^{2}}}{{{({{10}^{-10}})}^{2}}}=2.3\times {{10}^{-8}}N $



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