Q79 / 90 · JEE Main 2012 (19 May Online) · Physics

This question has Statement 1 and Statement 2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement 1: A metallic surface is irradiated by a monochromatic light of frequency $v>v_0$ (the threshold frequency). If the incident frequency is now doubled, the photocurrent and the maximum kinetic energy are also doubled. Statement 2: The maximum kinetic energy of photoelectrons emitted from a surface is linearly dependent on the frequency of the incident light. The photocurrent depends only on the intensity of the incident light.

  • A
    Statement 1 is true, Statement 2 is true, Statement 2 is the correct explanation of Statement 1.
  • Correct answer
    B
    Statement 1 is false, Statement 2 is true.
  • C
    Statement 1 is true, Statement 2 is false.
  • D
    Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation of Statement 1.

Solution

The maximum kinetic energy of photoelectrons depends upon frequency on incident light and photo current depends upon intensity of incident light.

Hence, the correct answer is option: 'B'.

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