Home
Class 12
PHYSICS
When light of wavelength 2000 Å is incid...

When light of wavelength 2000 Å is incident on tungsten the maximum velocity of photoelectrons ejected is observed to be `8 xx 10^(5)` m/s . The threshold wavelength for tungsten is

A

8822 Å

B

2828 Å

C

2882 Å

D

2288 Å

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC INDUCTION

    NIKITA PUBLICATION|Exercise MCQs|431 Videos
  • ELECTROSTATICS

    NIKITA PUBLICATION|Exercise Multiple Choice Questions|458 Videos

Similar Questions

Explore conceptually related problems

Light of wavelength 3000Å is incident on a metal surface whose work function is 1 eV. The maximum velocity of emitted photoelectron will be

The threshold frequency for a certain metal is v_(0) when light of frequency v = 2v_(0) is incident on it . The maximum velocity of photoelectrons is 4 xx 10^(6) m/s . If the frequency of incident radiation is increase to 5 v_(0) , the maximum velocity of photo electrons in m/s will be .

The threshold frequency for certain metal is v_0 . When light of frequency 2v_0 is incident on it, the maximum velocity of photoelectrons is 4xx10^(6) ms^(-1) . If the frequency of incident radiation is increaed to 5v_0 , then the maximum velocity of photoelectrons will be

Threshold frequency for a certain metal is v_0 . When light of frequency 2v_0 is incident on it, the maximum velocity of photoelectrons is 4xx10^8 cm s^-1 . If frequency of incident radiation is increased to 5v_0 , then the maximum velocity of photoelectrons, in cm s^-1 , will be

The work function for calcium is 2.14 eV. When a light of wavelength 5500Å is incident on it, photoelectrons are emitted , Calculate (i) threshold frequency and threshold wavelength. (ii) maximum velocity of the emitted electrons. (iii) change in maximum kinetic energy of the emitted photoelectrons if the intensity of the incident light is doubled. Take : h = 6.6 xx10^(-34) Js m_e-9xx10^(-31) kg c= 3xx10^8m//s

Light of wavelength 4000 Å is incident on a sodium surface for which the threshold wavelength of photoelectrons is 5420 Å. The work function of sodium is

When radiation of wavelength 3000 Å is incident on a photosensitive surface, the maximum K.E. of the photoelectrons is 2.5 eV. What is the stopping potential if radiation of wavelength 1500 Å is incident on the same surface ?

NIKITA PUBLICATION-ELECTRONS AND PHOTONS -MCQs
  1. When the ultraviolet light of wavelength 1.8 xx 10^(-7) m falls on ce...

    Text Solution

    |

  2. The light radiation of wavelength 6000 Å falls on a metal . The thresh...

    Text Solution

    |

  3. When light of wavelength 2000 Å is incident on tungsten the maximum ve...

    Text Solution

    |

  4. A photon of energy 12 V falls on metal surface whose work function is ...

    Text Solution

    |

  5. The photoelectric work function of the emitter of a photocell is 3.63 ...

    Text Solution

    |

  6. The threshold wavelength of a metal is 230 nm . The maximum K.E. of th...

    Text Solution

    |

  7. The photoelectric work function for potassium is 2 eV . The light of w...

    Text Solution

    |

  8. If the photoelectric work function of a metal is 5 eV , the threshold ...

    Text Solution

    |

  9. A charged water drop of weight 4 xx 10^(-18) kg and charge 1.6 xx 10^(...

    Text Solution

    |

  10. 10^(20) photons of wavelength 660 nm are emitted per second from a lam...

    Text Solution

    |

  11. A radio station operates at a frequency of 108.7 MHz with power out pu...

    Text Solution

    |

  12. Work function of tungsten and sodium are 4.4 eV and 2.3 eV respectivel...

    Text Solution

    |

  13. An ultraviolet light of wavelength 2000 Å irradiates a photo cell made...

    Text Solution

    |

  14. Light of two different frequencies whose photons have energies 1eV and...

    Text Solution

    |

  15. Light of wavelength 2200 Å falls on a metal surface . If 4.1 eV energy...

    Text Solution

    |

  16. Light of wavelength 5000 Å and intensity of 3.96 xx 10^(-3) watt//cm^(...

    Text Solution

    |

  17. When the light source is kept 20 cm away from a photo cell, stopping p...

    Text Solution

    |

  18. Light of frequency 1.5 times the threshold frequency is incident on a ...

    Text Solution

    |

  19. Light of waelength 4000Å is incident on a metal plate with work functi...

    Text Solution

    |

  20. The ratio of energy of photon of a wavelength 10^(-10) m that of photo...

    Text Solution

    |