Home
Class 12
PHYSICS
The anode vollage of a photocell is kept...

The anode vollage of a photocell is kept fixed . The wavelength `lambda `of the light falling on the cathode varies as follows

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-III|27 Videos

  • DUAL NATURE

    NARAYNA|Exercise NCERT BASED QUES.|26 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-I (C.W)|16 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 anode voltage of photocellis kept fixed. The wavelength lambda of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows:

The stopping potential in a photoelectric experiment is linearly related to the inverse of the wavelength (1/lambda) of the light falling on the cathode. The potential difference applied across an X-ray tube is linearly related to the inverse of the cutoff wavelength (1/lambda) of the X-ray emitted. Show that the slopes of the lines in the two cases are equal and find its value.

The cathode and anode in a photocell are respectively.

In the experimental setup for a photocell, the wavelength of the light incident on the cathod is initially 0.6 times the threshold wavelength for the material of the cathode. Certain change in the experimental setup are given in column A and their possibel effects are given in column B. {:("Column A","Column B"),((i)"The intensity of the incident light is doubled but the frequency remains unaltered",(a)"Photocurrent remains the same"),((ii)"Both the intensity and wavelength of the incident light are doubled",(b)"Photcurrent falls to zero"),((iii)"The intensity of the incident light is doubled and its wavelength is made half",(c)"Stopping potential increase"),((iv)"The intensity of the incident light ramains the same and the wavelength is made half",(d) "Photocurrent increases"):}

The maximum kinetic energy of photoelectron is doubled when the wavelength of light incident on the photosensitive changes from lambda_1 to lambda_2 . Deduce expression for the threshold wavelength and work function for metals in terms of lambda_1 and lambda_2

If lambda_(0) is the threshold wavelength for photoelectric emission. lambda wavelength of light falling on the surface on the surface of metal, and m mass of electron. Then de Broglie wavelength of emitted electron is :-

If one angle of a triangle is kept fixed then the measure of the remaining two angles vary inversely with each other

A vacuum photocell consists of a central cathode and an anode. The internal surface is silver of work function 4.5 eV. The contact potential difference between the electrodes equals to 0.6 V. The photocell is illuminated by light of wavelength 2.3xx10^-7 m. a. What retrading potential difference should be applied between electrodes of the photocell for the photocurrent to drop to zero? b. If a retarding potential of 1V is applied between electrodes at what limiting wavelength lamda of light incident on the cathode will on the cathode will the photoelectric effect begin?

NARAYNA-DUAL NATURE-LEVEL-II (C.W)
  1. If light of wavelength lambda(1) is allowed to fall on a metal , then ...

    Text Solution

    |

  2. Light of wavelength lambda strikes a photo - sensitive surface and ele...

    Text Solution

    |

  3. Ultraviolet light of wavelength 300nn and intensity 1.0Wm^-2 falls on ...

    Text Solution

    |

  4. Light rays of wavelength 6000A^(@) and of photon intensity 39.6 watts/...

    Text Solution

    |

  5. Ligth of wavelength 4000A^(@) is incident on a metal surface of work f...

    Text Solution

    |

  6. The kinetic energy of an electron is E when the incident wavelength is...

    Text Solution

    |

  7. A photon of energy 15eV collides with H-atom. Due to this collision, H...

    Text Solution

    |

  8. The anode vollage of a photocell is kept fixed . The wavelength lambda...

    Text Solution

    |

  9. According to Einstein's photoelectric equation , the graph between the...

    Text Solution

    |

  10. The graph of Fig. shows the variation of photoelectric current (I) ver...

    Text Solution

    |

  11. A proton when accelerated through a potential difference of V volt has...

    Text Solution

    |

  12. An electron of mass m and charge e initially at rest gets accelerated ...

    Text Solution

    |

  13. If the velocity of a particle is increased three times, then the perce...

    Text Solution

    |

  14. If the momentum of an electron is changed by p, then the de - Broglie ...

    Text Solution

    |

  15. When the mass of an electron becomes equal to thrice its rest mass, it...

    Text Solution

    |

  16. Which of the following graphs correctly represents the variation of pa...

    Text Solution

    |

  17. The de Broglie wave present in fifth Bohr orbit is:

    Text Solution

    |

  18. The correctness of velocity of an electron moving with velocity 50 ms^...

    Text Solution

    |

  19. If the uncertainity in the position of an electron is 10^(-10) m, then...

    Text Solution

    |

  20. a) Name the experiment for which the adjacent graph, showing the varia...

    Text Solution

    |