Q121 / 160 · TS EAMCET 2020 (11 Sep Shift 1) · Physics
Let $G, W, E$ and $S$ be relative strength of gravitational, weak-nuclear, electromagnetic and strong-nuclear forces, respectively. Which of the correct statement?
- A$S>W>E>G$
- B$E>W>S>G$
- Correct answerC$S>E>W>G$
- D$S>E>G>W$
Solution
We know that, among all inverse forces based on inverse square law's gravitational force is the weakest and nuclear force is the strongest.
Hence, $F_{\text {Strongnuclear }}>E_{\text {Electromagnetic }}>F_{\text {Gravitational }}$ $\ldots(\mathrm{i})$
Weak nuclear force is a fundamental force in nature that underlies some forms of radioactivity, governs the decay of unstable subatomic particles such as meson and initiates the nuclear fusion reaction that fuels the sun.
These forces are considered weaker than electromagnetic forces and stronger than gravitational forces, i.e.
$F_{\text {Electromagnetic }}>F_{\text {Weak nuclear }}>F_{\text {Gravitational }}$ $\ldots(\mathrm{ii})$
Given, $\quad F_{\text {Electromagnetic }}=E \Rightarrow F_{\text {Strongnuclear }}=S$
$F_{\text {Weak nuclear }}=W$ and $F_{\text {Gravitational }}=G$
Using Eqs. (i) and (ii), we get
$S>E>W>G$
Hence, the correct answer is option: 'C'.