Home
Class 12
PHYSICS
A photo cell is receiving light from a s...

A photo cell is receiving light from a source placed at a distance of `1 m`. If the same source is to be placed at a distance of `2 m` , then the ejected electron

A

moves with one - fourth energy as that of the initial energy.

B

moves with one - fourth of momentum as that of the initial momentum.

C

will be half in number.

D

will be one - fourth in number.

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET TEST 85

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos
  • NTA TPC JEE MAIN TEST 100

    NTA MOCK TESTS|Exercise PHYSICS (SUBJECTIVE NUMERICAL)|10 Videos

Similar Questions

Explore conceptually related problems

When a point source of light is at a distance of 50 cm from a photoelectric cell , the cut-off voltage is found to be V_(0) . If the same source is placed at a distance of 1 m from the cell , then the cut-off voltage will be

A photocell with a constannt potential differnce of V voolt across it, is illuminated by a point source from a distance of 25 cm. when the source is moved to a distance of 1 m, the electrons emitted by the photocell

When a point source of light is at a distance of one metre from a photo cell , the cut off voltage is found to be V . If the same source is placed at 2 m distance from photo cell , the cut off voltage will be

A photo cell is illuminated by a small bright source placed 1m away When the same source of light is placed 2m away, the electrons emitted by photo cathode

A photo-cell is illuminated by a source of light which is placed at a distance d from the cell . If the distance become d/2 . Then number of electrons emitted per seconed will be

When a point source of light is at a distnace of 1 m from a photo cell, the cut off voltage is is found to be V. if the same source is placed at 3m distance from photo cell, the cut of voltage will be

The distance between two coherent sources is 1 mm. The screen is placed at a distance of 1 m from the sources. If the distance of the third bright fringe is 1.2 mm from the central fringe, the wavelength of light used is

When a monochromatic source of light is at a distance of 0.2 m from a photocell, the stopping potential (cut off voltage) and the saturation current are found to be respectively 1 V and 27 mA. If the same source is placed at a distance 0.6 m from the cell, then

NTA MOCK TESTS-NTA NEET TEST 98-PHYSICS
  1. THE magnitude of maximum accesleration is pi times that of maximum ve...

    Text Solution

    |

  2. A pole is floating in a liquid with 80 cm of its length immersed. It i...

    Text Solution

    |

  3. A photo cell is receiving light from a source placed at a distance of ...

    Text Solution

    |

  4. The frequency of incident light falling on a photosensitive metal plat...

    Text Solution

    |

  5. Two liquids which do not react chemically are placed in a bent tube as...

    Text Solution

    |

  6. A soap bubble A of radius 0.03 m and another bubble B of radius 0.04 m...

    Text Solution

    |

  7. An air bubble in a glass slab with refractive index 1.5 (near normal i...

    Text Solution

    |

  8. A ray of light passing through a prism having refractive index sqrt(2)...

    Text Solution

    |

  9. A uniform meter scale of mass 1kg is placed on table such that a part ...

    Text Solution

    |

  10. Two solid cylinders P and Q of same mass and same radius start rolling...

    Text Solution

    |

  11. A zener diode, having breakdown voltage equal to 15 V is used in a vol...

    Text Solution

    |

  12. In an n-p-n transistor circuit, the collector current ia 10 mA. If 90%...

    Text Solution

    |

  13. For a rigid diatomic molecule, univerisal gas constant R = mc(p), wh...

    Text Solution

    |

  14. A spherical liquid drop is placed on a horizontal plane . A sma...

    Text Solution

    |

  15. Angular width of central maxima in the Fraunhofer diffraction pattern ...

    Text Solution

    |

  16. In the ideal double-slit experiment, when a glass-plate(refractive ind...

    Text Solution

    |

  17. A string of density 7.5 gcm^(-3) and area of cross - section 0.2mm^(2)...

    Text Solution

    |

  18. A closed organ pipe and an open organ pipe are tuned to the same funda...

    Text Solution

    |

  19. An engine pumps water through a hose pipe. Water passes through the pi...

    Text Solution

    |

  20. Power applied to a particle varices with time as P =(3t^(2)-2t + 1) wa...

    Text Solution

    |