Home
Class 12
PHYSICS
When the energy of the incident radiatio...

When the energy of the incident radiation is increased by 20 % , the kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV . The work function of the metal is

A

0.65 eV

B

1.0 eV

C

1.3 eV

D

1.5 eV

Text Solution

Verified by Experts

The correct Answer is:
B
`KE_(max) = hv - Psi` ….(A)
`0.5 eV = hv - Psi` …(B)
`0.8 eV = 1.2 hv - Psi`
solving `Psi = 1 eV`.
Promotional Banner

Topper's Solved these Questions

  • DAILY PRACTICE PROBLEM

    RESONANCE ENGLISH|Exercise DPP No.43|20 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE ENGLISH|Exercise DPP No.44|10 Videos

  • DAILY PRACTICE PROBLEM

    RESONANCE ENGLISH|Exercise DPP No.41|9 Videos

  • CURRENT ELECTRICITY

    RESONANCE ENGLISH|Exercise High Level Problems (HIP)|19 Videos

  • ELECTRO MAGNETIC WAVES

    RESONANCE ENGLISH|Exercise Exercise 3|27 Videos

Similar Questions

Explore conceptually related problems

When the energy of the incident radiation is increased by 20 % , kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV . The work function of the metal is

When the energy of the incident radiation is increased by 20 % , kinetic energy of the photoelectrons emitted from a metal surface increased from 0.5 eV to 0.8 eV . The work function of the metal is

On a photosensitive material, when frequency of incident radiation is increased by 30% kinetic energy of emitted photoelectrons increases from 0.4 eV to 0.9 eV . The work function of the surface is

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

The kinetic energy of photoelectrons emitted by a photosensitive surface depends on the internsity of the incident radiation

The surface of a metal illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : (hc=1240 eV.nm)

The kinetic energy of the most energetic photoelectrons emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from lamda_1 " to " lamda_2 The work function of the metal is

When an electro-magnetic radiation is incident on the surface of metal, maximum kinetic energy of photoelectron depends on-

The kinetic energy of most energetic electrons emitted from a metallic surface is doubled when the wavelength lamda of the incident radiation is changed from 400 nm to 310 nm. The work function of the metal is

0.24eV of energy is required to stop photoelectron emitted by radiation of wavelength 2480 Å . Find work function of metal used?

RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.42
  1. A heavy particle is projected from a point on the horizontal at an ang...

    Text Solution

    |

  2. A particle of mass m is fixed to one end of a massless spring of sprin...

    Text Solution

    |

  3. If an ideal cell of emf 5 volt shown in the figure gives a power of 10...

    Text Solution

    |

  4. The figure shows the tungsten filament with constant diameter except a...

    Text Solution

    |

  5. A triangular medium has varying refracting index mu = mu(0) + ax where...

    Text Solution

    |

  6. If pressure at half the depth of a lake is equal to 2//3 pressure at t...

    Text Solution

    |

  7. Two partical tied to different strings are whirled in a horizontal cir...

    Text Solution

    |

  8. A bob is attached to one end of a string other end of which is fixed a...

    Text Solution

    |

  9. Two solids A and B floats in water. It is observed that A floats with ...

    Text Solution

    |

  10. When the energy of the incident radiation is increased by 20 % , the k...

    Text Solution

    |

  11. Hydrogen atom in ground state is excited by a monochromatic radiation ...

    Text Solution

    |

  12. The resistance in the two arms of the meter bridge are 5 Omega and R O...

    Text Solution

    |

  13. Two cities are 150 km apart. Electric power is sent from one city to a...

    Text Solution

    |

  14. The electric field intensity at all points in space is given by vecE =...

    Text Solution

    |

  15. A particle of charge q(0) and of mass m(0) is projected along the y-ax...

    Text Solution

    |

  16. A meter bridge is setup as shown in figure, to determine an unknown re...

    Text Solution

    |

  17. Consider the circuit consisting of two capacitors having capacitances ...

    Text Solution

    |

  18. Six identical uniform conducting rods are fixed to make a regular hexa...

    Text Solution

    |

  19. The spectra of a black body at temperatures 273^(@)C and 546^(@)C are ...

    Text Solution

    |

  20. The time constant of the circuit shown in the figure is

    Text Solution

    |