Q. Two electrons are separated by a distance of $1\mathring{\mathrm{A}}$. What is the coulomb force between them
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
Explanation
(a) $F = 9 \times 10^{9} \times \frac{Q^{2}}{r^{2}} = 9 \times 10^{9} \times \frac{\left( 1.6 \times 10^{- 19} \right)^{2}}{\left( 10^{- 10} \right)^{2}} = 2.3 \times 10^{- 8}N$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.