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An electron collides with a hydrogen ato...

An electron collides with a hydrogen atom in its ground state and excites it to `n = 3` ,. The energy gives to hydrogen aton n this inclastic collision is [Neglect the recoiling of hydrogen atom]

A

10.2eV

B

12.1eV

C

12.5eV

D

None of these

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The correct Answer is:
B
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MOTION-MODERN PHYSICS -1-EXERCISE-1
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  3. An H atom in ground state is moving with initial kinetic energy K .It ...

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  4. An electron collides with a hydrogen atom in its ground state and exci...

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  5. An electron with kinetic energy 5eV is incident on a hydrogen atom in ...

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  6. An electron of energy 11.2 eV undergoes an inelastic collision with a...

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  7. The recoil speed of hydrogen atom after it emits a photon in going fro...

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  8. The recoil speed of a hydrogen atom after it emits a photon is going...

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  9. A neutron moving with speed a makes a heat on collision with a hydroge...

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  10. A hydrogen atom is in 5^("in") excited state. When the electron jumps ...

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  11. In a characteristic X-ray spectra of some atom superimposed on continu...

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  12. Which of the following wavelenght falls in X-rays region?

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  14. If the frequency of K(alpha), K(beta) and L(alpha) , X-ray lines of a...

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  15. In X-ray tube , when the accelerating voltage V is halved, the differe...

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  16. The voltage applied to an X-ray tube is 18 kV. The maximum mass of pho...

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  17. The wavelength of K(alpha) X-rays of two metals A and B are 4 // 1875 ...

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  18. The element which has a K(alpha) X-rays line of wavelength 1.8 Å is ...

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  20. When the voltage applied to an X-ray tube increases from V(1) = 10 kV ...

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