Home
Class 12
PHYSICS
A photocell is illuminated by a small br...

A photocell is illuminated by a small bright source places `1` m away when the same source of light is placed `(1)/(2)` m away. The number of electron emitted by photocathode would be

A

decrease by a factor of 2

B

increase by a factor of 2

C

decrease by a factor of 4

D

increase by a factor of 4

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 52

    NTA MOCK TESTS|Exercise PHYSICS|45 Videos

  • NTA NEET SET 54

    NTA MOCK TESTS|Exercise PHYSICS|44 Videos

Similar Questions

Explore conceptually related problems

A photocell is illuminated buy asmall bright source places 1 m away when the same source oh light is placed (1)/(2) m away. The number of electron emitted by photocathode would

A photocell is illuminated by a small bright source placed 1m away. When the same source of light is placed (1/2)m away, the number of electrons emitted by photocathode would

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 cesium photocell, with a steady potential difference of 60 V across it ,is illuminated by a small bright light placed 1m away. When the same light is placed 2m away, the electrons crossing the photocell

A photoelectric cell is illuminated by a point source of light 1 m away. When the source is shifted to 2 m then

A caesium photocell , with a steady potential difference of 60 V across , is alluminated by a bright point source of light 50 cm away. When the same light is placed 1 m away the photoelectrons emitted from the cell

A photoelectric cell is illuminated by a point source of light 1m away. When the source us shifted to 2m then-

NTA MOCK TESTS-NTA NEET SET 53-PHYSICS
  1. Starting with a sample of pure .^(66)Cu, 7//8 of it decays into Zn in ...

    Text Solution

    |

  2. The ends of a rod of length l and mass m are attached to two identica...

    Text Solution

    |

  3. A pendulum is executing simple harmonic motion and its maximum kinet...

    Text Solution

    |

  4. A photocell is illuminated by a small bright source places 1 m away w...

    Text Solution

    |

  5. The magnitude of x and y components of vec(A) are 7 and 6 respectively...

    Text Solution

    |

  6. The work done in blowing a bubble of volume V is W, then what is the w...

    Text Solution

    |

  7. A body is projected at time t = 0 from a certain point on a planet's s...

    Text Solution

    |

  8. A body of mass 8 kg is suspended through two light springs X and Y con...

    Text Solution

    |

  9. The two surfaces of a biconvex lens has same radii of curvatures . Thi...

    Text Solution

    |

  10. The displacement of an object attached to a spring and executing simpl...

    Text Solution

    |

  11. A sphere of mass M rolls without slipping on the inclined plane of inc...

    Text Solution

    |

  12. In the circuit below, A and B represents two inputs and C represents t...

    Text Solution

    |

  13. A ray of light travelling in the direction 1/2 (hati+sqrt(3)hatj) is i...

    Text Solution

    |

  14. A force vecF=alphahati+3hatj+6hatk is acting at a point vecr=2hati-6ha...

    Text Solution

    |

  15. Which of the two have the same dimensions ?

    Text Solution

    |

  16. Pressure of an ideal gas is increased by keeping temperature constant....

    Text Solution

    |

  17. A resistor of 10kOmega has a tolerance of 10% and another resistor of ...

    Text Solution

    |

  18. Fundamental frequency of a sonometer wire is n. If the length and di...

    Text Solution

    |

  19. A tuning fork of frequency 200 Hz is in unison with a sonometer wire ....

    Text Solution

    |

  20. Work down by static friction on an object :

    Text Solution

    |