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An electron in the hydrogen atom jumps ...

An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75eV. If the stopping potential of the photoelectron is 10V, then the value of n is :

A

3

B

4

C

5

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
`KE_(max) =10eV`
`phi =2.75 eV`
`E = phi+ KE_(max) = 12.75 eV` = Energy difference between `n =4 and n = 1 (n = 4)`
`rArr` value of `n = 4`
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RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.17
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  2. An electron in the hydrogen atom jumps from excited state n to the gr...

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  3. An electron of mass m and a photon have same energy E. The ratio of de...

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  5. A homogeneous ball (mass=m) of ideal black material at rest is illumin...

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  6. An orbit electron in the ground state of hydrogen has an angular momen...

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  7. When a metallic surface is illuminated with monochromatic light of wav...

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  8. A photosensitive metallic surface has work function, h v(0). If photon...

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  9. A source S(1) is producing 10^(15) photons per second of wavelength 50...

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