Home
Class 11
PHYSICS
A point source causes photoelectric effe...


A point source causes photoelectric effect from a small metal plate. Which of the curves in Fig. may represent the saturation photo-current as a function of the distance between the source and the metal?

A

A

B

B

C

C

D

D

Text Solution

Verified by Experts

The correct Answer is:
D
`Iprop I prop 1/("distance"^(2)`
Promotional Banner

Topper's Solved these Questions

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise Exercise|19 Videos

  • CALORIMETRY

    RESONANCE ENGLISH|Exercise Exercise|19 Videos

Similar Questions

Explore conceptually related problems

A point source of light is used in an experiment on photoelectric effect . Which of the following curves best represents the variation of photo current (i) with distance (d) of the source from the emitter ?

A point source is situated at a distance x lt f from the pole of the concave mirror of focal length f. At time t=0 the point source starts moving away from the mirror with constant velocity. Which of the graphs below represents best, variation of image distance |v| with distance x between the pole of mirror and the source.

A point source of light is used in a photoelectric effect. If the source is moved farther from the emitted metal, the stopping potential

The anode plate in an experiment on photoelectric effect is kept vertically above the cathode plate. Light source is put on and a saturation photocurrent is recorded. An electric field is switched on which has vertically downward direction

Fig. shows the variation of stopping potential V_0 with the frequency v of the incident radiation for two photosensitive metal P and Q: (i) Explain which metal has smaller threshold wavelength (ii) Explain, giving reason, which metal emits photoelectrons having smaller kinetic energy, for the same wavelength of incident radiation. (iii) If the distance between the light source and metal P is doubled, how will the stopping potential change.

Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal surface ?

Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal surface?

Which of the graphs shown below does not represent the relationship between incident light and the electron ejected from metal surface?

In an experiment on the photoelectric effect, an evecuated photocell with a pure metal cothode is used. Which graph best represents the variation of B, the minimum potential defference needed to prevent current from flowing, when x, the frequency of the incident light, is varied?

A source emitting sound of frequency 180 Hz is placed in front of a wall at a distance of 2 m from it. A detector is also placed in front of the wall at the same distance from it. Find the minimum distance between the source and the detector for which the detector detects a maximum of sound. Speed of sound in air =360ms^-1 .

RESONANCE ENGLISH-ATOMIC PHYSICS-Exercise
  1. A parallel beam of uniform, monochromatic light of wavelength 6600 Å h...

    Text Solution

    |

  2. Yellow light of 557 nm wavelength is incident on a cesium surface. It ...

    Text Solution

    |

  3. A point source causes photoelectric effect from a small metal plate. W...

    Text Solution

    |

  4. If n(r) and n(b) are respectively, the number of photons emitted by a ...

    Text Solution

    |

  5. When light of intensity 1W//m^2 and wavelength 5xx10^(-7)m is incident...

    Text Solution

    |

  6. Light of wavelength 5000Å falls on a sensitive plate with photoelectri...

    Text Solution

    |

  7. The photoelectric work function for a metal surface is 4.125eV. The cu...

    Text Solution

    |

  8. The wavelength of a photon and the deBroglie wavelength of an electron...

    Text Solution

    |

  9. A proton and an alpha-particle are accelerated through the same potent...

    Text Solution

    |

  10. Linear momenta of a proton and an electrons are euqal. Relative to an...

    Text Solution

    |

  11. Momentumof gamma - ray proton of energy 3 keV in kg-m/s will be

    Text Solution

    |

  12. Wrong statement in connection with Davisson-Germer experiment is

    Text Solution

    |

  13. The correct relation betweeen the angle of diffraction phi and the gla...

    Text Solution

    |

  14. Object are exposed to the X-rays in a dark room. They will appear

    Text Solution

    |

  15. The intensity of an X-ray beam reduces to 36.8% of its initial intensi...

    Text Solution

    |

  16. An X-ray tube operating at 50kV converts 1% energy in the form of X-ra...

    Text Solution

    |

  17. A beam of electron accelerated by a large potential difference V is ...

    Text Solution

    |

  18. Production of continuous X-rays is caused by

    Text Solution

    |

  19. The minimum wavelength lambdamin in the continuous spectrum of X-rays ...

    Text Solution

    |

  20. If lamda(v),lamda(X) and lambda(m) represented the wavelenght of visi...

    Text Solution

    |