Home
Class 12
PHYSICS
A photon having 8 eV energy is incident ...

A photon having 8 eV energy is incident on metal suraface with threshold frequency of `1.6xx10^(15)` Hz .Maximum kinetic energy of photoelectron emitted will be…….
`h=6.6xx10^(-34)JS,c=3xx10^(8)m//s`
`eV=1.6xx10^(-19)JS`

A

1.4 eV

B

0.4 eV

C

4.2 eV

D

2.8 eV

Text Solution

Verified by Experts

The correct Answer is:
A
`(1)/(2)mv_(max)^(2)=E-phi_(0)`
`=(E-(hf_(0))/(e))eV [because phi_(0)=(hf_(0))/(e)]`
`=(8-(6.6xx10^(-34)xx1.6xx10^(15))/(1.6xx10^(-19)))`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in GUJCET/Board Exam)|1 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    KUMAR PRAKASHAN|Exercise Section-D (MCQs asked in CBSE-PMT,AIPMT,NEET)|1 Videos

  • CURRENT ELECTRICITY

    KUMAR PRAKASHAN|Exercise SECTION [D] MULTIPLE CHOICE QUESTIONS (MCQs) (MCQs ASKED IN BOARD EXAM AND GUJCET)|23 Videos

  • ELECTRIC CHARGES AND FIELDS

    KUMAR PRAKASHAN|Exercise SECTION D MCQS ASKED IN COMPETITIVE EXAMES (MCQS AKSED IN BOARD EXAM AND GUJCET)|14 Videos

Similar Questions

Explore conceptually related problems

Wavelength of photon having 35 keV energy will be…….. (h=6.625xx10^(-34))J-s,c=3xx10^(8)ms^(-1),1eV=1.6xx10^(-19)J) .

Frequency of photon having 66 eV energy will be…… (h=6.6xx10^(-34)Js)

The wavelength of photon having energy of 35 keV is …….. (h=6.625xx10^(-34)J-s, c=3xx10^(8)ms^(-1), 1eV=1.6xx10^(-19)J) .

Work function of metal is 1.6 eV for which maximum wavelength photoelectric emission can be obtained ? [h=6.6xx10^(-34)JS,c=3xx10^(8)m//s]eV=1.6xx10^(-19) J]

On metal surface radiation of 2000Å and 5000 Å is incident sequentially .Change in kinetic energy of photo-electric emitted during this will be…….h =6.6xx10^(-34) Js .

1 mole photon having frequency 4.0 xx 10^(14) Hz find energy

Frequency of photon having 100 eV energy is ……Hz [ h=6.62xx10^(-34)Js,1eV=1.6xx10^(-19)Js]

Ultraviolet light of 200 nm wavelength is incident on polished surface of iron .Its work function is 4.71 eV what will be value of stopping potential? [h=6.626xx10^(-34)]JSc=3xx10^(8)m//s1eV=1.6xx10^(-19)J ]

The threshold frequency of cesium is 5.16 xx 10^(14) Hz. Then its work-function is _____ eV.

KUMAR PRAKASHAN-DUAL NATURE OF RADIATION AND MATTER-Section-D (MCQs asked in AIIMS)
  1. Wavelength of matter particle is independent of which of the quantitie...

    Text Solution

    |

  2. No .of photon emitted eery second from 60 W bulb will be ………

    Text Solution

    |

  3. A photon having 8 eV energy is incident on metal suraface with thresho...

    Text Solution

    |

  4. Ultraviolet light of 200 nm wavelength is incident on polished surface...

    Text Solution

    |

  5. alpha-particle and deuteron moves with speed v and 2v respectively .Wh...

    Text Solution

    |

  6. If linear momentum of a particle is 2.2xx10^(4) kgms^(-1) then what wi...

    Text Solution

    |

  7. In photoelectric effect threshold wavelength of sodium is 5000Å .Find ...

    Text Solution

    |

  8. Photoelectric effect represent that ………..

    Text Solution

    |

  9. Frequency of photon having 100 eV energy is ……Hz [h=6.62xx10^(-34)Js,1...

    Text Solution

    |

  10. An electron and proton move in same direction with equal kinetic energ...

    Text Solution

    |

  11. Work function of photosensitive surface is phi .When photon of 3phi en...

    Text Solution

    |

  12. If particle mentioned below moves with same velocity which will have h...

    Text Solution

    |

  13. Work function of metal is 1.6 eV for which maximum wavelength photoele...

    Text Solution

    |

  14. The K.E. of photoelecttron emitted from a metal are K(1) and K(2) ,whe...

    Text Solution

    |

  15. A particle of mass m kg and charge q coulomb is accelerated through V ...

    Text Solution

    |

  16. When a strong electric field of approximately ……is applied on the meta...

    Text Solution

    |

  17. If kinetic energy of emitted electron is made double then its de-Brogl...

    Text Solution

    |

  18. Threshold wavelength for lithium metal is 6250 Å wavelength of inciden...

    Text Solution

    |

  19. Object of 100 g mass moves with velocity of 36 km/hr .de-Broglie wavel...

    Text Solution

    |

  20. The wavelength of de-Broglie wave associated with a neutron of mass m ...

    Text Solution

    |