Home
Class 12
PHYSICS
The threshold frequency for a metallic s...

The threshold frequency for a metallic surface corresponds to an energy of `6.2eV` and the stopping potential for a radiation incident on this surface is `5 V` . The incident radiation lies in

A

X-ray region

B

ultra-violet region

C

infra-red region

D

visible region

Text Solution

Verified by Experts

The correct Answer is:
B
`lambda=(1242eVnm)/(11.2)~~1100 B232Å`
Ultraviolet region
Promotional Banner

Topper's Solved these Questions

  • ATOMIC PHYSICS

    RESONANCE|Exercise Advanved level problems|17 Videos

  • ATOMIC PHYSICS

    RESONANCE|Exercise Exercise-2 Part-III : Comprehension|12 Videos

  • ALTERNATING CURRENT

    RESONANCE|Exercise HIGH LEVEL PROBLEMS|11 Videos

  • CAPACITANCE

    RESONANCE|Exercise High Level Problems|16 Videos

Similar Questions

Explore conceptually related problems

The threshould frequency for a metallic surface corresponds to an energy of 6.2eV and the stopping potential for a radiation insident on this surface is 5 V . The incident radiation lies in

The threshold frequency for a photosensitive surface corresponds to an energy of 6.5 eV. If the stopping potential for radiations incident on this surface is 3V, then the energy of the incident radiation will be

The slope of frequency of incident light and stopping potential for a given surface will be

When the frequency of incident radiation is less than threshold frequency for a metal surface, what is value of stopping potential for that and why?

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 ?

The threshold energy of a surface is 2 eV. When irradiated with some radiations, the stopping potential is found to be 3.6 V. The energy of the incident photon is

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the internsity of the incident radiation

When a metallic surface is illuminated with radiation of wavelength lamda , the stopping potential is V . If the same surface is illuminated with radiation of wavelength 2lamda , the stopping potential is V/4 . The threshold wavelength for the metallic surface is

When light off frequency v_1 is incident on a photosensitive surface , the stopping potential is V_1 . If the frequency of incident radiation becomes v_1//2 the stopping potential changes to V_2 Find out the expression for the threshold frequency for the surface in terms of V_1 and V_2 If the frequency of incident radiation is doubled , will the maximum kinetic energy of the photoelectrons also be doubled ? Given reason .

RESONANCE-ATOMIC PHYSICS-Exercise -3 part -I JEE (Advanced)
  1. The time taken by a photoelectron to come out after the photon strikes...

    Text Solution

    |

  2. An alpha nucleus of energy (1)/(2)m nu^(2) bombards a heavy nucleus o...

    Text Solution

    |

  3. The threshold frequency for a metallic surface corresponds to an energ...

    Text Solution

    |

  4. The anode vollage of a photocell is kept fixed . The wavelength lambda...

    Text Solution

    |

  5. Photon of frequency v has a momentum associated with it. If c is the v...

    Text Solution

    |

  6. Which of the following transitions in a hydrogen atom emits photon of ...

    Text Solution

    |

  7. Suppose an electron is attracted toward the origin by a force(k)/(r ) ...

    Text Solution

    |

  8. The transition from the state n=4 to n=3 in a hydrogen is ultraviolet ...

    Text Solution

    |

  9. The surface of a metal illuminated with the light of 400 nm. The kinet...

    Text Solution

    |

  10. Statement - 1 : When ultraviolet light is incident on a photocell , it...

    Text Solution

    |

  11. If a source of power 4 kW produces 10^(20) photons//second, the radiat...

    Text Solution

    |

  12. Energy required for the electron excitation in Li^(++) from the first ...

    Text Solution

    |

  13. This question has statement - 1 and statement - 2 of the four choice g...

    Text Solution

    |

  14. After absorbing a slowly moving neutrons of mass m(N) (momentum ~0) a...

    Text Solution

    |

  15. Hydrogen atom is excieted from ground state to another state with prin...

    Text Solution

    |

  16. A diatomic molecule is made of two masses m(1) and m(2) which are sepa...

    Text Solution

    |

  17. The anode voltage of photocellis kept fixed. The wavelength lambda of ...

    Text Solution

    |

  18. In a hydrogen like atom electron make transition from an energy level ...

    Text Solution

    |

  19. Hydrogen (.(1)H^(1)), Deuterum (.(1)H^(2)), singly ionised Hellium (....

    Text Solution

    |

  20. As an electron makes a transition from an excited state to the ground ...

    Text Solution

    |