Home
Class 12
PHYSICS
Two identical photocathodes receive the ...

Two identical photocathodes receive the light of frequencies f1 and f2 respectively. If the velocities of the photo-electrons coming out are v1 and v2 respectively, then

A

`v_1^2 - v_2^2 = (2h)/m(f_1-f_2)`

B

`v_1+v_2 = ((2h)/m(f_1+f_2))^(1//2)`

C

`v_1^2_v_2^2=(2h)/m(f_1+f_2)`

D

`v_1-v_2 = ((2h)/m(f_1-f_2))^(1//2)`.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • UNIT TEST -07

    MODERN PUBLICATION|Exercise EXERCISE|154 Videos

  • UNIT TEST -06

    MODERN PUBLICATION|Exercise EXERCISE|461 Videos

  • UNIT TEST-05

    MODERN PUBLICATION|Exercise EXERCISE|69 Videos

Similar Questions

Explore conceptually related problems

Two bodies of equal masses move with uniform velocities v and 3v respectively. Find the ratio of their kinetic energies.

Define the term work function of a metal. The threshold frequency of a metal is f_0 when the light of frequency 2f_0 is incident on the metal plate, the maximum velocity of electrons emitted is v_1 , when the frequency of the incident radiation is increased to 5f_0 , the maximum velocity of electrons emitted is v_2 . Find the ratio of v_1 and v_2 .

If photons of frequency v are incident on the surface of metals A and B of threshold frequencies v/2 and v/3 respectively, the ratio of the maximum kinetic energy of electrons emitted from A to that from B is:

Photons of frequency v are incident on the surfaces of two metals A and B of threshold frequencies 3/4v and 2/3 v respectively. The ratio of the maximum kinetic energy of electrons emitted from A to B is

The electronegativities of F and H are 4.0 and 2.1 respectively. The percent ionic character in H and F bond is

Compute the missing frequencies f_1 and f_2 in the following data if the mean is 166frac(9)(26) sum of observations is 52.

The figure VSAQ 29 shows a plot of three curves a,b,c, showing the variation of photocurrent in collector plate potential for three different intensities I_1 , I_2 and I_3 having frequencies v_1 , v_2 and v_3 respectively incident on a photosensitive surface. Point out the two curves for which the incident raidations have the same frequency but different intensities.

The oxidation potential of two metals X and Y are +2.37 and +1.66 V respectively. In a chemical reaction:

If p.d. V applied across a conductor is increased to 2V, how will the drift velocity of the electron change?

MODERN PUBLICATION-UNIT TEST -07-EXERCISE
  1. The threshold freuency for a metallic surface corresponds to an energy...

    Text Solution

    |

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

    Text Solution

    |

  3. Two identical photocathodes receive the light of frequencies f1 and f2...

    Text Solution

    |

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

    Text Solution

    |

  5. The de-Broglie wavelength of a tennis ball of mass 60 g moving wiht a ...

    Text Solution

    |

  6. If the kinetic energy of a free electron doubles,its de-Broglie wavele...

    Text Solution

    |

  7. A radiation of energy E falls normally on a perfecly reflecting surfac...

    Text Solution

    |

  8. Direction:Answer the MCQ no.15 to 17 on the basis of the folowing para...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  11. Wavelength of the radiation of freuquency 100 Hz is :

    Text Solution

    |

  12. Planck's constant has the dimetnsion of

    Text Solution

    |

  13. The value of Planck's constant is

    Text Solution

    |

  14. The energy of a photon of wavelelngth lambda is

    Text Solution

    |

  15. If a phtoton has velocity c and frequency v ,then wchich of the follow...

    Text Solution

    |

  16. The mass of photon at rest is:

    Text Solution

    |

  17. Monochromatic light of frequency 6 xx 10^(14) Hz is produced by a LAS...

    Text Solution

    |

  18. Which one among the following shows particle nature of ligth?

    Text Solution

    |

  19. The energy of a photon of light is 3 eV.Then,the wavelength of photon ...

    Text Solution

    |

  20. A source S1 is producing 10^(15) photons s^(-1) of wavelength 5,000 ov...

    Text Solution

    |