Question

calculate the distance between two electrons for which the coulomb force between them is approximately equal to weight of electron

Answer 1

The distance between two electrons is 15.91 meters

Explanation:

Weight of the electron, $F=9.1\times 10^{-31}\ kg$

Charge on electron, $q=1.6\times 10^{-19}\ C$

According to given condition, the coulomb force between them is approximately equal to weight of electron. Let d is the distance between two electrons. The force is given by :

$F=k\dfrac{q^2}{d^2}$

$d=\sqrt{\dfrac{kq^2}{F}}$

$d=\sqrt{\dfrac{9\times 10^9\times (1.6\times 10^{-19})^2}{9.1\times 10^{-31}}}$

d = 15.91 m

So, the distance between two electrons is 15.91 meters. Hence, this is the required solution.

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Topic : Electrostatic force

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