Home
Class 12
CHEMISTRY
A phot of energy h upsilon is absorbed b...

A phot of energy `h upsilon` is absorbed by a free electron of a metal having work function `phi lt h upsilon`

A

The electron is sure to come out

B

The electron is sure to come out with a kinetic energy `(hv-w)`

C

Either the electron does not come out or it comes with a kinetic energy `(hv-w)`

D

It may come out with a kinetic energy less than `(hv-w)`

Text Solution

Verified by Experts

The correct Answer is:
D
Photoelectric effect is a eandom phenomena. So, electron It may come out with a kinetic energy less than `(hv-w)` as some energy is lost while escaping out.
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR CHEMISTRY

    RESONANCE|Exercise Exercise-2|25 Videos

  • NUCLEAR CHEMISTRY

    RESONANCE|Exercise Exercise-20|1 Videos

  • NUCLEAR CHEMISTRY

    RESONANCE|Exercise Exercise-1|47 Videos

  • NITROGEN CONTAINING COMPOUNDS

    RESONANCE|Exercise ORGANIC CHEMISTRY(Nitrogen containing Compounds)|30 Videos

  • P BLOCK ELEMENTS

    RESONANCE|Exercise PART -II|24 Videos

Similar Questions

Explore conceptually related problems

A photon of energy hv is absorbed by a free electron of a metal having work- function phi lt hv . Choose the correct option(s).

A when a photon of energy hv is incidnet on an electron in a metal of work function phi ( lt hv) , the electron will not necesserily come out of the metal . R : work function is the minimum energy required to liberate an electron out of a metal . So some electons may require more energy for their liberation .

Light having photon energy hupsilon is incident on a metallic plate having work function phi to eject the electrons. The most energetic enectrons are then allowed to enter in a region of uniform magnetic field B as shown in Fig. The electrons are projected In X-Z plane making an angle theta with X-axis and magnetic field is vecB=B_0hati along X-axis maximum pitch of the helix described by an electron is found to be p. Take mass of electron as m and charge as q. Based on the above information, answer the following questions: Q. The plot between X-coordinate of the location of electron as a function of time for different frequencies upsilon of the incident light is

The light rays having photons of energy 1.8 eV are falling on a metal surface having a work function 1.2 eV . What is the stopping potential to be applied to stop the emitting electrons ?

A photon of energy 7 eV is incident on a metal surface having the work function of 3.75 eV. What is the stopping potential ?

A beam of light of wavelength lambda is incident on a metal having work function phi and placed on a metal having work function phi and placed in a magnetic field B. The most energetic electrons emitted perpendicular to the field are bent in circular arcs of radius R. Then

The thereshold wavelenght for a metal of work function W_(0) is lambda . The threshold wavelenght for a metal having work function 3W_(0) will be

Light of wavelength 4000Å is allowed to fall on a metal surface having work function 2 eV. The maximum velocity of the emitted electrons is (h=6.6xx10^(-34)Js)

In H-atom energy of electron is datermined by :

In a phtoelectron effect energy of photon is directly proportional to the frequency and photons are totally absorbed by the electrons of metals then frequency and photons are totally absorbed by the electrons of metals then photoelectric current is:

RESONANCE-NUCLEAR CHEMISTRY-PART -II
  1. A bulb of 40 W is producing a light of wavelength 620 nm with 80% of e...

    Text Solution

    |

  2. Light of wavelength lambda falls on metal having work functions hc//la...

    Text Solution

    |

  3. A phot of energy h upsilon is absorbed by a free electron of a metal h...

    Text Solution

    |

  4. Correct order of radius of the first orbit of H, He^+, Li^(2 +), Be^(3...

    Text Solution

    |

  5. What is likely to be orbit number for a circular orbit of diameter 20 ...

    Text Solution

    |

  6. Which is the correct relationship? (a). E(1) of H=1//2E(2) of He^(+)=1...

    Text Solution

    |

  7. If the value of E=-78.4 "kcal//mol", the order of the orbit in hydroge...

    Text Solution

    |

  8. If velocity of an electron in I orbit of H atom is V, what will be the...

    Text Solution

    |

  9. In a certain electronic transition in the hydrogen atoms from an init...

    Text Solution

    |

  10. S(1) : Bohr model is applicable for Be^(2+) ion . S(2) : Total ener...

    Text Solution

    |

  11. S(1) : Potential energy of the two opposite charge system increase wit...

    Text Solution

    |

  12. The energy of a hydrogen atom in its ground state is -13.6 eV. The ene...

    Text Solution

    |

  13. The wavelength of a spectral life for an electronic transition inverse...

    Text Solution

    |

  14. In a sample of H- atom electrons make transition from 5^(th) excited ...

    Text Solution

    |

  15. Total no of lines in Lyman series of H spectrum will be- (where n=n...

    Text Solution

    |

  16. Number of visible lines when an electron returns from 5th orbit to gro...

    Text Solution

    |

  17. Suppose that a hypothetical atom gives a red, green, blue and violet l...

    Text Solution

    |

  18. The difference between the wave number of 1st line of Balmer series an...

    Text Solution

    |

  19. The approximate wavelength associated with a gold-ball weighting 200 g...

    Text Solution

    |

  20. What possible can be the ratio of the de-Broglie wavelength for two el...

    Text Solution

    |