Home
Class 12
PHYSICS
The energy of incident radiation, which ...

The energy of incident radiation, which emits the electrons with a velocity of `2.5 xx 10^(6)` m/s and work function 1.8 e V , is

A

`1.937` eV

B

2 e V

C

19.57 e V

D

20.1 eV

Text Solution

Verified by Experts

The correct Answer is:
C
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

A radiation of 3300 Å falls on a metal to eject electrons with a maximum velocity of 0.4 xx10^6 m//s, the value of the work function of metal is nearly (h=6.6 xx10^-34J-s,m_e =9.1 xx10^-31 kg)

An electron of work function 1.4 eV is emitted with a velocity 5 xx 10^(6) m/s . The wavelength of the incident radiation is

The photoelectron of work function 3.1 eV is emitted with velocity 2.5 xx 10^(6) m/s . The frequency of incident radiation is

A star which is emitting radiation at a wavelength of 5000A is approaching the earth with a velocity of 1.50 xx10^(6) m//s The change in wavelegth of the radiation as received on the earth is

Compute the force (in vetcor notation ) on an electron moving with velocity vecV = 2.5 xx 10^(6)hati m//s in a magnetic field vecB =(10hati- 6 hatk) xx 10 ^(2) Wb//m^(2) , if charge on an electron e =1.6 xx 10^(-19) coulomb.

First orbit velocity of electron is 2.1 xx 10^(6) m//s then the velocity of 3rd orbit electron is

For a certain metal v = 2 v_(0) and the electrons come out with a maximum velocity of 4 xx 10^(6) m/s . If the value of v = 5 v_(0) , then maximum velocity of the photoelectrons will be

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV. The work function of the metal is:

NIKITA PUBLICATION-ELECTRONS AND PHOTONS -MCQs
  1. Light of wavelength 3 xx 10^(-7) m is incident on a photosensitive sur...

    Text Solution

    |

  2. For a certain metal v = 2 v(0) and the electrons come out with a maxim...

    Text Solution

    |

  3. The energy of incident radiation, which emits the electrons with a vel...

    Text Solution

    |

  4. An electron of work function 1.4 eV is emitted with a velocity 5 xx 10...

    Text Solution

    |

  5. The photoelectron of work function 3.1 eV is emitted with velocity 2.5...

    Text Solution

    |

  6. When an inert gas is filled in the place vacuum in a photo cell , then

    Text Solution

    |

  7. In photoelectric cell ,the electrons leave the surface with maximum en...

    Text Solution

    |

  8. The stopping potential for the photoelectrons , from a photocell , is ...

    Text Solution

    |

  9. The maximum number of the photoelectrons , released in a photocell , i...

    Text Solution

    |

  10. The use of photoelectric cell in cinema depends upon the fact that the...

    Text Solution

    |

  11. Photoelectric cell is a device in which the light energy is converted ...

    Text Solution

    |

  12. The maximum energy of the electrons released in photocell is independe...

    Text Solution

    |

  13. The cathode of a photoelectric cell is changed such that the work func...

    Text Solution

    |

  14. A milliammeter in the circuit of a photoelectric cell measures

    Text Solution

    |

  15. A lamp is placed at a distance of 16 cm, from a photocell and the curr...

    Text Solution

    |

  16. Which of the following graphs shows relation between maximum K.E. and ...

    Text Solution

    |

  17. Light from a hydrogen tube is incident on the cathode of a photoelectr...

    Text Solution

    |

  18. A wave is associated with matter when it is

    Text Solution

    |

  19. The amount of energy radiated by a body depends upon

    Text Solution

    |

  20. The rest mass of the photon is

    Text Solution

    |