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# Find the Electric Force Between Two Protons Separated by a Distance of 1 Fermi (1 Fermi = 10−15 M). the Protons in a Nucleus Remain at a Separation of this Order. - Physics

Short Note

Find the electric force between two protons separated by a distance of 1 fermi (1 fermi = 10−15 m). The protons in a nucleus remain at a separation of this order.

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#### Solution

We know:
Charge on a proton, = 1.6 × 10−19 C
Given, separation between the charges, r = 1015 m
By Coulomb's Law, electrostatic force,

$F = \frac{1}{4\pi \epsilon_0}\frac{q_1 q_2}{r^2}$

$\Rightarrow F = 9 \times {10}^9 \times \frac{\left( 1 . 6 \times {10}^{- 19} \right)^2}{\left( {10}^{- 15} \right)^2}$
$\Rightarrow F = 230 N$

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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 7 Electric Field and Potential
Q 5 | Page 121
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