Home
Class 12
PHYSICS
If stopping potentials corresponding to ...

If stopping potentials corresponding to wavelengths `4000A` and `4500A` are 1.3 V and 0.9 V, respectively, then the work function of the metal is

A

`0.3eV`

B

`1.3eV`

C

`1.8eV`

D

`5eV`

Text Solution

Verified by Experts

The correct Answer is:
C
`hgamma=w+K.E rArr hgamma =w+V_(0)e`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-I (H.W)|7 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

  • ELECTRIC CHARGES AND FIELDS

    NARAYNA|Exercise EXERCISE -4|43 Videos

Similar Questions

Explore conceptually related problems

The stopping potential (V_(0))

For certain photosensitive material, a stopping potential of 3.0 V is required for light of wavelength 300nm , 2.0V for 400nm and 1.0V for 600nm . The work function of the material is (nearly)

In an experiment on photoelectric effect, the stopping potential is measured for monochromatic light beams corresponding to different wavelength. The data collected are as follows: wavelength (nm): 350 400 450 500 550 stopping potential (V): 1.45 1.00 0.66 0.38 0.16 Plot the stopping potential against inverse of wavelength on a graph paper and find (a) the Planck constant, (b) the work function of the emitter and (c) the threshold wavelength .

(a) If the wavelength of the light incident on a photoelectric cell be reduced from lambda_(1) to lambda_(2) Å , then what will be the change in the cut-off potential? (b) Light is incident on the cathode of a photocell and the stopping voltages are measured for light of two different wavelengths. From the data given below, determine the work function of the metal of the cathode in eV and the value of the universal constant hc//e . {:("WavelengthÅ","Stopping voltage (volt)"),(4000, 1.3),(4500, 0.9):}

Light is incident on the cathode of a photocell and the stopping voltages are measured from light of two difference wavelengths. From the data given below, determine the work function of the metal of the cathode in eV and the value of the universal constant hc/e. Wavelength (Å) Stopping voltage (volt) 4000 1.3 4500 0.9

Metal surface emits photoelectrons when light of wavelength 400 nm is incident on it. Calculate the work function of the metal if stopping potential is 0.5 V.

In photoelectric effect experiment, the stopping potential for incident light of wavelength 4000 Å, is 3V. If the wavelength is changed to 2500 Å, the stopping potential will be

In a photoelectric effect experiment, the stopping potential is 0.71 V and corresponding wavelength of incident photon was 491 nm. Now the stopping potential of battery is increased to 1.4 V. Find new wavelength of incident photon ?

NARAYNA-DUAL NATURE-LEVEL-II (H.W)
  1. When a metal surface is illuminated by a monochromatic light of wave-l...

    Text Solution

    |

  2. Ultraviolet light of wavelength 800 A and 700 A when allowed to fall ...

    Text Solution

    |

  3. In a photoelectric effect experiment, photons of energy 5eV are incide...

    Text Solution

    |

  4. The number of photons emitted per second by a 62W source of monochroma...

    Text Solution

    |

  5. Photons of frequencies 2.2xx10^(15) Hz and 4.6xx10^(15) Hz are inciden...

    Text Solution

    |

  6. If stopping potentials corresponding to wavelengths 4000A and 4500A ar...

    Text Solution

    |

  7. In a photoelectric experiment anode potential is ploted against plate ...

    Text Solution

    |

  8. An electron moves with a speed of sqrt3/2c. Then its mass becomes…. Ti...

    Text Solution

    |

  9. Photons of energy 2.0eV fall on a metal plate and release photoelectro...

    Text Solution

    |

  10. A proton when accelerated through a p.d of V volt has wavelength lambd...

    Text Solution

    |

  11. The momentum of photon of electromagnetic radiation is 3.3xx10^(-29)kg...

    Text Solution

    |

  12. If the energy of a particle is reduced to one fourth, then the percent...

    Text Solution

    |

  13. The de Broglie wavelength associated with an electron of velocity 0.3c...

    Text Solution

    |

  14. The two lines A and B in fig. show the photo electron of de Broglie wa...

    Text Solution

    |

  15. The uncertainity in the position of a particle is equal to the de-Brog...

    Text Solution

    |

  16. If the uncertainty in the position of proton is 6xx10^-8m, then the mi...

    Text Solution

    |

  17. From Davisson-Germer experiment an alpha particle and a proton are acc...

    Text Solution

    |