New ! Physics MCQ Practise Tests



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

12th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Physics

Time : 00:30:00 Hrs
Total Marks : 15
    5 x 3 = 15
  1. The figure shows a plot of three curves a, b, c showing the variation of photocurrent vs. Collector plate potential for three different intensities I1, I2, and Ihaving frequencies v1, v2 and v3 respective incident on a photosensitive surface.
    The figure shows a plot of three curves a, b, c showing the variation of photocurrent vs. Collector plate potential for three different intensities I1, I2, and I3 having frequencies v1,v2, and v3 respective incident on a photosensitive surface.

  2. The frequency V of incident radiation is greater than threshold frequency (vo) in a photocell. How will the stopping potential vary if frequency (v) is increased, keeping other factors constant?

  3. Two metals A and B have work functions 4eV and 10eV respectively. Which metal has the higher threshold wavelength?

  4. de Broglie wavelength associated with an electron accelerated through a potential difference V is \(\lambda\). What will be the de Broglie wavelength when the accelerating potential is increased to 4 V?

  5. Red light however bright it is, cannot produce the emission of electrons from a clean zinc surface, but even weak ultraviolet radiation can do so; why?

*****************************************

Reviews & Comments about 12th Standard English Medium Physics Subject Dual Nature of Radiation and Matter Creative 3 Mark Questions with Solution Part - II updated Creative Questions

Write your Comment