Home
Class 12
PHYSICS
The time taken by a photoelectron to com...

The time taken by a photoelectron to come out after the photon strikes is approximately

A

(a)`10^(-4)s`

B

(b)`10^(-10)s`

C

(c)`10^(-16)`

D

(d)`10^(-1) s`

Text Solution

Verified by Experts

The correct Answer is:
B

The photoelectric phenomenon is an instantaneous phenomenon, hence the time taken be an electron to come out of metal is approximately `10^(-10)` sec (found experimentally).
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

The work function of a substance is 4.0 eV. The longest wavelength of light that can cause photoelectron emission from this substance is approximately:

How water comes out from the cell ?

A body is slipping from an inclined plane of height h and length l . If the angle of inclination is theta , the time taken by the body to come from the top to the bottom of this inclined plane is

Answer the following questions: (d) Every metal has a definite work function. Why do all photoelectrons not come out with the same energy if incident radiation is monochromatic? Why is there an energy distribution of photoelectrons?

When photons of energy 4.25 eV strike the surface of metal A, the ejected photoelectrons have maximum kinetic energy T_(A) eV and De-broglie wavelength lambda_(A) . The maximum energy of photoelectron liberated from another metal B by photon of energy 4.70 eV is T_(B) = (T_(A) - 1.50) eV if the de Brogle wavelength of these photoelectrons is lambda_(B) = 2 lambda_(A) , then

The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV . The stopping potential , in volt is

Two metallic plate A and B , each of area 5 xx 10^(-4)m^(2) , are placed parallel to each at a separation of 1 cm plate B carries a positive charge of 33.7 xx 10^(-12) C A monocharonatic beam of light , with photoes of energy 5 eV each , starts falling on plate A at t = 0 so that 10^(16) photons fall on it per square meter per second. Assume that one photoelectron is emitted for every 10^(6) incident photons fall on it per square meter per second. Also assume that all the emitted photoelectrons are collected by plate B and the work function of plate A remain constant at the value 2 eV Determine (a) the number of photoelectrons emitted up to i = 10s, (b) the magnitude of the electron field between the plate A and B at i = 10 s, and (c ) the kinetic energy of the most energotic photoelectrons emitted at i = 10 s whenit reaches plate B Negilect the time taken by the photoelectrons to reach plate B Take epsilon_(0) = 8.85 xx 10^(-12)C^(2)N- m^(2)

The time taken by a particle performing SHM to pass from point A and B where it is velocities are same that is 2 m/s . After another 2 s it returns to B. The time period oscillation is (in seconds)

Do all the electrons that absorb a photon come out as photoelectrons?

A river 4.0 miles wide is following at the rate of 2 miles/hr. The minimum time taken by a boat to cross the river with a speed v=4 miles/hr (in still water) is approximately

ALLEN -SIMPLE HARMONIC MOTION-Exercise-04 [B]
  1. If kinetic energy of emitted electron is made double then its de-Brogl...

    Text Solution

    |

  2. Energy corresponding to threshold frequency of metal is 6.2 eV.For giv...

    Text Solution

    |

  3. The time taken by a photoelectron to come out after the photon strikes...

    Text Solution

    |

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

    Text Solution

    |

  5. Photon of frequency v has a momentum associated with it. If c is the v...

    Text Solution

    |

  6. In an experiment, electrons are made to pass through a narrow slit of ...

    Text Solution

    |

  7. Wave property of electron implies that they will show diffraction effe...

    Text Solution

    |

  8. Wave property of electron implies that they will show diffraction effe...

    Text Solution

    |

  9. Wave property of electrons implies that they will show diffraction eff...

    Text Solution

    |

  10. Statement - 1 : When ultraviolet light is incident on a photocell , it...

    Text Solution

    |

  11. If the source of power 4 kW produces 10^(20) photons/second , the r...

    Text Solution

    |

  12. This question has statement - 1 and statement - 2 of the four choice g...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |