Gujarati
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

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