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 $
