Home
Class 12
PHYSICS
the radiation emitted when an electron j...

the radiation emitted when an electron jumps from `n=4` to `n=3` in a lithium atom (`z=3` ) fall on a metal surface to produce photoelectron , when the photoelectron with maximum Kinetic energy are made to move perpendicular to a magnetic field of `2xx10^(-4)T` , it traces a circular path of radius `sqrt(9.1/(1.6))cm`, [RhC=13.6eV] (mass of electron=`9.1xx10^(-31)kg)`

Text Solution

Verified by Experts

(a) `lambda= 2.08 xx 10^(-7)m`, (b) 3.96 eV, (c ) 2 eV
Promotional Banner

Topper's Solved these Questions

  • PHYSICS PART-III

    FIITJEE|Exercise ASSIGNMENT SECTION-II MCQ (SINGLE CORRECT)|47 Videos

  • PHYSICS PART-III

    FIITJEE|Exercise MCQ (MULTIPLE CORRECT)|18 Videos

  • PHYSICS PART-III

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS DECIMAL TYPE|11 Videos

  • OPTICS

    FIITJEE|Exercise NUMERICAL BASED QUESTIONS|2 Videos

  • PHYSICS PART2

    FIITJEE|Exercise Numerical Based Question Decimal Type|6 Videos

Similar Questions

Explore conceptually related problems

The rediation emitted when an electron jumps from n = 3 to n = 2 orbit in a hydrogen atom falls on a metal to produce photoelectron. The electron from the metal surface with maximum kinetic energy are made to move perpendicular to a magnetic field of (1//320) T in a radius of 10^(-3) m . Find (a) the kinetic energy of the electrons, (b) Work function of the metal , and (c) wavelength of radiation.

The radius of the path of an electron moving at a speed of 3xx10^(7) ms^(-1) perpendiuclar to a magnetic field 5xx10^(-4) T is nearly

Radiation, with wavelenght 651 Å falls on a metal surface to produce photoelectrons. The electrons are made to enter a uniform magnetic field of 3 xx 10^(-4) T. If the radius of the largest circular path followed by the electrons is 10 mm, the work function of the metal is close to:

The radiation corresponding to 3 rarr 2 transition of hydrogen atom falls on a metal surface to produce photoelectrons . These electrons are made to enter circuit a magnitic field 3 xx 10^(-4) T if the ratio of thelargest circular path follow by these electron is 10.0 mm , the work function of the metal is close to

The radiation corresponding to 3 rarr 2 transition of a hydrogen atom falls on a gold surface to generate photoelectrons. These electrons are passed through a magnetic field of 5 xx 10^(–4) T. Assume that the radius of the largest circular path followed by these electrons is 7 mm, the work function of the metal is : (Mass of electron =9.1xx10^(-31) kg )

The rest mass of an electron is 9.1 xx10^(-31) kg. Its kinetic energy when it moves with a speed of 2.4xx10^(8) m/s is

A photon of wavelength 500 nm falls on metal surface of work function 1.3 eV. An electron releases from metal moved in a perpendicular magnetic field. In a circular path of radius 30 cm. Then the magnitude of magnetic field be?

Light emitted by hydrogen gas corresponding to transition from n= 3 to n=2 incident on a metal plate.The electron emitted from metal plate with maximum kinetic energy enters a magnetic field 5 xx 10^-4T perpendicularly. If the radius of path of electron is 7 mm then find the work function of metal.

An electron is moving in a cyclotron at a speed of 3.2 xx 10^(7) m s^(-1) in a magnetic field of 5 xx 10^(-4) T perpendicular to it. What is the frequency of this electron? (q=1.6xx10^(-19)C, m_(c)=9.1xx10^(-31)kg)

FIITJEE-PHYSICS PART-III-ASSIGNMENT SECTION-II SUBJECTIVE
  1. A uniform solid cylinder of radius r and mass m rolls without slipping...

    Text Solution

    |

  2. Find the angular -frequncy of small oscillation of block m in the arra...

    Text Solution

    |

  3. A right -angular glass prism is kept in a medium whose refractive inde...

    Text Solution

    |

  4. the radiation emitted when an electron jumps from n=4 to n=3 in a lith...

    Text Solution

    |

  5. Find the maximum kinetic enegry of photoelectrons liberated form the s...

    Text Solution

    |

  6. In a Young's double slit experiment the light source is at distance va...

    Text Solution

    |

  7. In the arrangement shown the angle of thin prism is 1^@ . The image of...

    Text Solution

    |

  8. A monochromatic point source S is emitting light of wavelength lambda=...

    Text Solution

    |

  9. Energy liberated in the de-excitation of hydrogen atom from the third ...

    Text Solution

    |

  10. A point source S emitting light of wavelength 600 nm is placed at a ve...

    Text Solution

    |

  11. An equi-convex lens of focal length F in air is is cut into two halves...

    Text Solution

    |

  12. Photons emitted by a gas consisting of excited hydrogen like atoms (A)...

    Text Solution

    |

  13. The wavelength of the first line of the Lyman series of a hydrogen lik...

    Text Solution

    |

  14. Electromagnetic radiation whose electric component varies sinusoidally...

    Text Solution

    |

  15. In a screw guage the graduation in the circular scale consists of 100 ...

    Text Solution

    |

  16. The energy levels of a hypothetical one electron atom are given E(n...

    Text Solution

    |

  17. An object O is placed 30 cm away from a convex lens of focal length 10...

    Text Solution

    |

  18. Two sources s1 and s2 emitting wavelengths lambda1 and lambda2 are pla...

    Text Solution

    |

  19. There are two black bodies A and B with temperatures 1500 k and 3600 k...

    Text Solution

    |

  20. A point source of sound radiates energy at the rate of 3.14 watts. Fin...

    Text Solution

    |