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:
D
Promotional Banner

Topper's Solved these Questions

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise-05 [A]|39 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise-05 [B]|12 Videos

  • SIMPLE HARMONIC MOTION

    ALLEN |Exercise Exercise-04 [A]|20 Videos

  • RACE

    ALLEN |Exercise Basic Maths (Wave Motion & Dopplers Effect) (Stationary waves & doppler effect, beats)|25 Videos

  • TEST PAPER

    ALLEN |Exercise PHYSICS|4 Videos

Similar Questions

Explore conceptually related problems

In a historical experiment to determine Planck's constant, a metal surface was irradiated with light of different wavelengths. The emitted photoelectron energies were measured by applying a stopping potential. The relevant data for the wavelength (lambda) . ) of incident light and the corresponding stopping potential (V_0 ) are given below : Given that c=3xx10^8ms^(-1) and e=1.6xx10^(-19)C Planck's constant (in units of J s) found from such an experiment is

In Young's double-slit experiment using monochromatic light of wavelength lambda , the intensity of light at a point on the screen where path difference is lambda , is K units. What is the intensity of light at a point where path difference is lambda//3 ?

In a Young's double slit experiment, the separation between the two slits is d and the wavelength of the light is lamda . The intensity of light falling on slit 1 is four times the intensity of light falling on slit 2. Choose the correct choice (s).

Consider the optical system shown in figure. The point source of ligth S is having wavelength equal to lambda . The light is reaching screen only after reflection. For point P to be socond maxima, the value of lambda would be ( D gt gt d and d gt gt lambda )

A glass of refractive index 1.5 is coated with a thin layer of thickness t and refractive index 1.8 . Light of wavelength lambda travelling in air is incident normally on the layer. It is partly reflected at the upper and the lower surfaces of the layer and the two reflected rays interface . If lambda = 648 nm , obtain the least value of t ("in" 10^(-8)m ) which the rays interface constructively.

Light of wavelength lambda_(ph) falls on a cathode plate inside a vacuum tube as shown in the figure .The work function of the cathode surface is phi and the anode is a wire mesh of conducting material kept at distance d from the cathode. A potential different V is maintained between the electrodes. If the minimum de Broglie wavelength of the electrons passing through the anode is lambda_(e) which of the following statement (s) is (are) true?

M_(1) and M_(2) are plane mirrors and kept parallel to each other. At point O, there will be a maxima for wavelength lambda . Light from a monochromatic sources S of wavelength lambda is not reaching directly on the screen. Then, lambda is

A certain metallic surface is illuminated with monochromatic light of wavelength lambda .The stopping potentail for photelectric current for this light is 3V_(0) .If the same surface is illuminated with light of wavelength 2lambda ,the stopping potential is V_(0) .The threshold wavelength for this surface for photoelectric effect is

ALLEN -SIMPLE HARMONIC MOTION-Exercise-04 [B]
  1. This question has statement - 1 and statement - 2 of the four choice g...

    Text Solution

    |

  2. Statement-1: Davisson-Germer experiment established the wave nature of...

    Text Solution

    |

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

    Text Solution

    |

  4. If N(0) is the original mass of the substance of half - life period t(...

    Text Solution

    |

  5. At a specific instant emission of radioactive compound is deflected in...

    Text Solution

    |

  6. Which of the following radiation has the least wavelength ?

    Text Solution

    |

  7. which a U^(238) nucleus original at rest , decay by emitting an alpha ...

    Text Solution

    |

  8. A radioactive sample at any instant has its disintegration rate 5000 d...

    Text Solution

    |

  9. A nucleus with Z =92 emits the following in a sequence: alpha,beta^(...

    Text Solution

    |

  10. Which of the following cannot be emitted by radioactive substances dur...

    Text Solution

    |

  11. In the nuclear fusion reaction (1)^(2)H + (1)^(3)H rarr (2)^(4)He + ...

    Text Solution

    |

  12. A nucleus ruptures into two nuclear parts, which have their velocity r...

    Text Solution

    |

  13. The binding energies per nucleon for deuteron (.1H^2) and helium (.2He...

    Text Solution

    |

  14. An alpha particle of energy 5 MeV is scattered through 180^(@) by a fi...

    Text Solution

    |

  15. The intensity of gamma radiation from a given source is I On passing...

    Text Solution

    |

  16. Starting with a sample of pure .^66 Cu, 7//8 of it decays into Zn in 1...

    Text Solution

    |

  17. If radius of the .(13)^(27)Al nucleus is estimated to be 3.6 Fermi, th...

    Text Solution

    |

  18. A nuclear transformation is denoted by X(n,alpha) rarr. (3)^(7)Li. Whi...

    Text Solution

    |

  19. An alpha-nucleus of energy (1)/(2)mv^(2) bombards a heavy nuclear targ...

    Text Solution

    |

  20. When .(3)Li^(7) nuclei are bombarded by protons , and the resultant nu...

    Text Solution

    |