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In Millikan's experiment, an oil drop ha...

In Millikan's experiment, an oil drop having charge `q` gets stationary on applying a potential difference `V` in between two plates separated by a distance 'd'. The weight of the drop is

A

`qVd`

B

`q(d)/(V)`

C

`(q)/(Vd)`

D

`q(V)/(d)`

Text Solution

Verified by Experts

The correct Answer is:
D
`QE = mg rArr mg = (QV)/(d) [As V = (E)/(d)]`
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A2Z-ATOMIC PHYSICS-Section D - Chapter End Test
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  3. The diagram shown the energy levels for an electron in a certain atom....

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  4. An energy of 24.6 eV is required to remove one of that electrons from ...

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  5. The transition from the state n = 4 to n = 3 in a hydrogen-like atom r...

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  6. A hydrogen atom and a Li^(2+) ion are both in the second excited stat...

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  7. The electric potential between a proton and as electron is given by V=...

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  8. A hydrogen like atom with atomic number Z is in an excited state of q...

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  9. The transition from the state n = 4 to n = 3 in a hydrogen-like atom r...

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  10. In a hypotherical Bohr hydrogen, the mass of the electron is doubled. ...

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  11. What is the radius of iodine atom (at no. 53, mass number 126)?

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  12. An electron passing through a potential difference of 4.9 V collides w...

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  13. Which of the following atoms has the lowest ionization potential ?

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  14. The seond line of Balmer series has wavelength 4861 Å The wavelength o...

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  15. If the wavelength of photon emitted due to transition of electron from...

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  16. If the series limit wavelength of the Lyman series for hydrogen atom i...

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  17. The first line of Balmer series has wavelength 6563 Å. What will be th...

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  18. An atom makes a transition from a state of energy E to one of lower en...

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  19. The ratio of the speed of the electron in the first Bohr orbit of hyd...

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  20. An electron in H atom makes a transition from n = 3 to n = 1. The reco...

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  21. If the atom(100)Fm^(257) follows the Bohr model the radius of (100)Fm^...

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