Physics Circle home Student Login

Home›Chapters›Units, Dimensions and Measurement PYQs›Applications of Dimensional Analysis›Question 52

JEE Main 2020 (8 Jan, Shift 1) · Applications of Dimensional Analysis

Applications of Dimensional Analysis question from JEE Main 2020 (8 Jan, Shift 1)

Q52JEE Main 2020 · 8 JAN · SHIFT 1Easy

Applications of Dimensional Analysis

The dimension of stopping potential V0 in photoelectric effect in units of Planck's constant 'h', speed of light 'c' and Gravitational constant 'G' and ampere A is:

Show answer and solution

Answer: (b)

  1. [V0]=[ML2T−3A−1][V_0] = [ML^2T^{-3}A^{-1}].
  2. [c5]=[L5T−5][c^5] = [L^5T^{-5}], [G−1]=[ML−3T2][G^{-1}] = [ML^{-3}T^2].
  3. [c5G−1]=[ML2T−3][c^5G^{-1}] = [ML^2T^{-3}], so [V0]=[h0c5G−1A−1][V_0] = [h^0c^5G^{-1}A^{-1}].
  4. So the answer is (b).
Report a mistake

More questions on Applications of Dimensional Analysis