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Friday, 9 October

JEE Main 2020 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 8 January 2020, Shift 1, Physics Q1

Question 1 of 75 in this shift, Physics question 1 of 25, Section A. NTA dropped this question from the final key; it is left out of every count on this site.

The dimension of stopping potential V0V_0 in photoelectric effect in units of Planck's constant 'h', speed of light 'c' and Gravitational constant 'G' and ampere A is :
  1. (1)h2G3/2c1/3A−1h^{2}G^{3/2}c^{1/3}A^{-1}
  2. (2)h1/3G2/3c1/3A−1h^{1/3}G^{2/3}c^{1/3}A^{-1}
  3. (3)h2/3c5/3G1/3A−1h^{2/3}c^{5/3}G^{1/3}A^{-1}
  4. (4)h−2/3c−1/3G4/3A−1h^{-2/3}c^{-1/3}G^{4/3}A^{-1}

Official answer

Dropped by NTA (marks given to all)

NTA final key (Jan 2020).

Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.