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\mathrm{\mathrm{F}_{\mathrm{g}}\: and \: \mathrm{F}_{\mathrm{e}}} represent the gravitational and electrostatic forces respectively between two electrons situated at a distance of \mathrm{10\: \mathrm{cms}}. The ratio of \mathrm{\mathrm{F}_{\mathrm{g}} / \mathrm{Fe}_{\mathrm{e}}}  is of the order of
 

Option: 1

10^{43}


 


Option: 2

10^{36}
 


Option: 3

10^{-43}
 


Option: 4

10^{-36}


Answers (1)

best_answer

\mathrm{ \frac{\mathrm{F}_{\mathrm{g}}}{\mathrm{F}_{\mathrm{e}}}=\frac{\frac{\text { Gme me }}{\mathrm{r}^2}}{\frac{1}{4 \pi \varepsilon_0} \frac{\mathrm{e}^2}{\mathrm{r}^2}} }

\mathrm{ =\frac{6.67 \times 10^{-11} \times\left(9 \times 10^{-31}\right)^2}{9 \times 10^9 \times\left(1.6 \times 10^{-19}\right)^2}=10^{-43} }

Hence option 3 is correct.
 

Posted by

shivangi.shekhar

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