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1. Electric Charges and Fields
medium
Two electrons are separated by a distance of $1\,\mathop A\limits^o $. 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
Solution
(a) $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$
Standard 12
Physics
