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Saturday, 31 October

JEE Main 2024 · PhysicsMultiple choiceDiagram basedEasyData or graph

JEE Main 4 April 2024, Shift 1, Physics Q46

Question 46 of 90 in this shift, Physics question 16 of 30, Section A.

Which figure shows the correct variation of applied potential difference (V) with photoelectric current (I) at two different intensities of light (I1<I2I_1 < I_2) of same wavelengths :

The figure, in words

Four i-V graphs as options (axes i vertical, V horizontal, -V0 marked on the negative V-axis), curves labelled I1 and I2.
  1. (1)[figure: graph of i vs V; curve I1 starts at -V0 on the V-axis, curve I2 starts at a point to the right of -V0 (smaller magnitude of stopping potential) and rises more steeply to a higher saturation, crossing I1]
  2. (2)[figure: graph of i vs V; I1 and I2 both start at the same point -V0 on the V-axis, I2 lies above I1 and saturates higher]Official answer
  3. (3)[figure: graph of i vs V; I1 starts at -V0 and saturates lower; I2 starts from the origin (V = 0) and rises steeply, crossing I1 and saturating higher]
  4. (4)[figure: graph of i vs V; I2 starts at -V0, I1 starts at a point slightly to the right of -V0, I2 lies above I1 and both saturate]

Official answer

Option 2

NTA final key.

Chapter
Dual Nature of Radiation and Matter
Topic
Photoelectric Effect
Idea tested
Intensity vs Frequency Effects

Same idea in other shifts

Asked 3× in all
  1. 8 Apr 2023, Shift 2 · Q45In photo electric effect A. The photocurrent is proportional to the intensity of the incident radiation. B. Maximum Kinetic energy with…EasyOther
  2. 27 Aug 2021, Shift 1 · Q18In a photoelectric experiment, increasing the intensity of incident light :EasySingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.