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PhysicsNEET 2025Photoelectric effect and Einstein's equation

Dual Nature of Radiation and Matter

Which of the following options (graphs A–D shown) represent the variation of photoelectric current with the property of light shown on the -axis?

Question 38 as printed in the NEET 2025 booklet

  1. A.A only
  2. B.A and C
  3. C.A and D
  4. D.B and D

Solution

Above the threshold frequency the photoelectric current is proportional to the intensity (graph A, straight line through the origin) and is independent of frequency, so B, C and D are wrong. A only.

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