NEET UG 2026 · Physics · Question 8
NEET 2026 Physics, question 8
Question 8 of the NEET 2026 paper (re-exam) is a Physics question from Dual Nature of Radiation and Matter. Its idea, Effect of Intensity vs. Frequency, was asked twice, in 2025 and 2026, across NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q8 · Physics
A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time t, then variation of the photocurrent I and magnitude of the stopping potential |V| with time is best represented by :
The figure, described in words
Options are pairs of graphs (I vs t, |V| vs t), each either constant (horizontal line) or decreasing linearly to zero.
- 1[graphs: I decreases linearly to zero; |V| constant]Official answer
- 2[graphs: I decreases linearly to zero; |V| decreases linearly to zero]
- 3[graphs: I constant; |V| decreases linearly to zero]
- 4[graphs: I constant; |V| constant]
Official answer: option 1 · NTA final answer key
Same idea
Effect of Intensity vs. Frequency, in other papers
NEET asked this idea twice, in 2025 and 2026. The other question below.
- 2025 Q38Which of the following options represent the variation of photoelectric current with property of light shown on the x-axis? A. [graph:…Figure-based · Medium
Effect of Intensity vs. Frequency: every question and how it was framed
The chapter
Dual Nature of Radiation and Matter in ten years of NEET
20 questions from 2017–2026, asked in 10 of 10 papers, about 1.9 a paper. Photoelectric Effect alone had 20.