Q168 / 180 · KCET 2020 · Physics

Two protons are kept at a separation of $10 \mathrm{~nm}$. Let $F_{n}$ and $F_{e}$ the nuclear force and the electromagnetic force between them

  • A
    $F_{e}=F_{n}$
  • Correct answer
    B
    $F_{e} \gg F_{n}$
  • C
    $F_{e} < F_{n}$
  • D
    $F_{e}$ and $F_{n}$ differ only slightly

Solution

The nuclear forces are short range forces in range of few $\mathrm{fm}$ (ferrometre). whereas, electromagnetic force are long range forces. So, at a separation of $10 \mathrm{~nm}$, the electromagnetic force is greater than the nuclear force between two protons, i.e. $F_{e} \gg F_{n}$

Hence, the correct answer is option: 'B'.

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