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An electron is moving round the nucleus ...

An electron is moving round the nucleus of a `H_2` atom in a circular orbit of radius r. The coulomb force F between the two is

A

`Ke^2/r^2hatr`

B

`-Ke^2/r^3r`

C

`-Ke^2/r^3hatr`

D

`Ke^2/r^2r`

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BINA LIBRARY-ELECTROSTATICS-EXERCISE
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  2. The charges q each are placed at a distance 2a and a third charge -2q ...

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  3. An electron is moving round the nucleus of a H2 atom in a circular orb...

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  4. A charge Q µC is placed at the centre of a cube. The flux coming out f...

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  5. If there are n capacitors in parallel connected to V volt source. The ...

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  6. Two spherical conductors cach of capacity C are charged to potential V...

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  7. A parallel plate capacitor is first charged and then a dielectric slab...

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  8. A parallel plate capacitor is filled by copper plate of thickness b. T...

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  9. A capacitor works in

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  10. A particle of mass m and charge q is placed at rest in a uniform elect...

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  11. The K.E. of an electron which is accelerated in a potential difference...

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  12. When two charged conductors are connected by a conducting wire, then c...

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  13. Electron volt is the unit of

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  14. Unit of capacitance of a capacitor is

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  15. Which of the following is a vector quantity ?

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  16. A hollow insulated brass sphere is positively charged. The electric po...

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  17. A charge q is placed at the Centre of the line joining two equal charg...

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  18. If one penetrates a uniformly charged sphere the electric field

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  19. Work done in moving a positive charge on an equipotential surface is

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  20. Work done in moving a unit positive charge through a disance x metre o...

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