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12th Standard English Medium Physics Subject Dual Nature of Radiation and Matter Creative 3 Mark Questions with Solution Part - I Question Bank Software Jun-18 , 2021

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12th Standard English Medium Physics Subject Dual Nature of Radiation and Matter Creative 3 Mark Questions with Solution Part - I

12th Standard English Medium Physics Subject Dual Nature of Radiation and Matter Creative 3 Mark Questions with Solution Part - I

12th Standard

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Physics

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 3 = 15

  1. List out the laws of photoelectric effect. (or) Write any three Laws of Photoelectric Effect

  2. When the electron orbiting in a hydrogen atom in its ground state moves to the third excited state, show how the de Broglie wavelength associated with it would be affected?

  3. The graph shows the variation of stopping potential with frequency of incident radiation for two photosensitive metals A and B. Which one of the two has higher value of workfunction? Justify your answer.

  4. Show the variation of photocurrent with collector plate potential for different frequencies but same intensity of incident radiation.

  5. (i) Draw a graph showing variation of photoelectric current (I) with anode potential (V) for different intensities of incident radiation. Name the characteristic of the incident radiation that is kept constant in this experiment.
    (ii) If the potential difference used to accelerate electrons is doubled, by what factor does the de-Broglie wavelength associated with the electrons change?

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