Home
Class 12
PHYSICS
A graph regarding photoelectric effect i...

A graph regarding photoelectric effect is shown between the maximum kinetic energy of electrons and the frequency of the incident light. On the basis of data as shown in the graph, calculate (a) threshold frequency , (b) work- function, (c ) planck's constant

A

`2 eV`

B

`4 eV`

C

`4.2 eV`

D

`2.5 eV`

Text Solution

Verified by Experts

The correct Answer is:
B
From the graph threshold frequency `(f_(0))=10xx10^(-14) Hz`
`h=(8xx1.6xx10^(-19))/(20xx10^(14))=6.4xx10^(-34) J`
work function =`hf_(0)=4eV`
Promotional Banner

Topper's Solved these Questions

  • DUAL NATURE

    NARAYNA|Exercise NCERT BASED QUES.|26 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-V|31 Videos

  • DUAL NATURE

    NARAYNA|Exercise LEVEL-II (C.W)|20 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

  • ELECTRIC CHARGES AND FIELDS

    NARAYNA|Exercise EXERCISE -4|43 Videos

Similar Questions

Explore conceptually related problems

A graph regarding photoelectric effect is shown between the maximum kinetic energy of electrons and the frequency of the incident light. On the basis of data as shown in the graph, calculate (a) threshold frequency , (b) work- function, (c ) planck constant

The maximu kinetic energy (E_(k)) of the photoelectron varies with frequency (v) of the incident light as shown by the curve:

According to Einstein's photoelectric equation , the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is

According to Einstein's photoelectric equation, the graph between kinetic energy of photoelectrons ejected and the frequency of the incident radiation is :

For the photoelectric effect, the maximum kinetic energy E_(k) of the emitted photoelectrons is plotted against the frequency ν of the incident photons as shown in the figure. The slope of the curve gives

The correct graph respectivley the relation between energy (E ) of photoelectrons and frequency v of incident light is

In an experiment on photoelectic effect, the graph between maximum kinetic energy (K_(max)) and frequency of emitted photoelectron from metal surface is found to be a straight line as shown in fig. Calculate (a) thereshold frequency. (b) work function of metal in electron volt. (c) Planck's constant and maximum kinetic energy of the emitted electron by light of frequency v=8xx10^(14)s^-1 .

For a photoelectric experiment graph between kinetic energy of fastest electron and frequency of light is plotted find threshold wavelength of metal.

In photo electric effect, the slope of the straight line graph between stopping potential and frequency of the incident light gives the ratio of Planck's constant to

NARAYNA-DUAL NATURE-LEVEL-III
  1. An electron accelerated under a p.d. Of V volt has a certain wavelengt...

    Text Solution

    |

  2. The graph between the stopping potential (V(0)) and ((1)/(lambda)) is...

    Text Solution

    |

  3. For certain photosensitive material, a stopping potential of 3.0 V is ...

    Text Solution

    |

  4. A graph regarding photoelectric effect is shown between the maximum k...

    Text Solution

    |

  5. Light described at a place by the equation E = (100V//M) xx [sin (5 xx...

    Text Solution

    |

  6. The electric field associated with a light wave is given by E= E0 sin...

    Text Solution

    |

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

    Text Solution

    |

  8. Photoelectric effect supports quantum nature of light because (a) th...

    Text Solution

    |

  9. If the wavelength of light in an experiment on photoelectric effect is...

    Text Solution

    |

  10. Intensity and frequency of incident light both are doubled. Then, wha...

    Text Solution

    |

  11. In which of the following cases the heavier of the two particles has a...

    Text Solution

    |

  12. When a monochromatic point source of light is at a distance of 0.2 m...

    Text Solution

    |

  13. In a photoelectric experiment, the wavelength of the incident light is...

    Text Solution

    |

  14. Photoelectric threshold of silver is lamda=3800A. Ultraviolet light of...

    Text Solution

    |

  15. Photoelectric threshold of silver is lamda=3800A. Ultraviolet light of...

    Text Solution

    |

  16. Photoelectric threshold of silver is lamda=3800A. Ultraviolet light of...

    Text Solution

    |

  17. A 100 W point source emits monochromatic light of wavelength 6000 A ...

    Text Solution

    |

  18. A 100 W point source emits monochromatic light of wavelength 6000 A ...

    Text Solution

    |

  19. 1.5 mW of 400 nm light is directed at a photoelectric cell. If 0.1% of...

    Text Solution

    |

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

    Text Solution

    |