In a $PN$ junction photocell,the value of the photo-electromotive force produced by monochromatic light is proportional to

  • A
    The voltage applied at the $PN$ junction
  • B
    The barrier voltage at the $PN$ junction
  • C
    The intensity of the light falling on the cell
  • D
    The frequency of the light falling on the cell

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[Use $h = 6 \times 10^{-34} \ J \cdot s$ and $c = 3 \times 10^8 \ m/s$]

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