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Consider a gold nucleus to be a sphere of redius 6.9 fermi in whichprotons and neutrons are distributed. Find the force of repulsion between two protons situated at largest separaton. Why do thes protons not fly apart under this repulsion

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The largest separation between two Protons be `=2r=fermi `
` So, F=9xx10^9xx(1.6xx10^-19)^2/(2r)^2=1.2N.`
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HC VERMA-ELECTRIC FIELD AND POTENTIAL-Exercises
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  4. Two insulating small spheres are rubbed against each other and placed ...

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  5. Na Cl moecule is bound due to the electreic force between the sodium a...

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  6. Find the ratio of the electric and gravitational forces between two pr...

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  7. Suppose ana attractive nuclear force acts between two protons which ma...

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  8. Three equal charges, 2.0xx 10^(-6) C each, are held fixed at the thr...

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  10. A hydrogen atom contains one proton and one electron. It may be assume...

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  13. Two charged particles having charge 2.0xx 10^(-8)C each are joined by ...

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  14. Two indentical balls, each having a charge of 2.00xx10^(-7) C and a ma...

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  15. Two identical pith balls are charged by rubbing against each other. T...

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  16. Two small spheres, each having a mass of 20 g, are suspended form a co...

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  17. Two indentical pith balls, each carrying charge q, are suspended from...

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  18. A particle having a charge of 2.0xx10^(-4) C is placed directly below ...

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  19. Two particles A and B having charges q and 2q respectively are placed ...

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