JEE Main 2023 · 25 Jan · Shift 2

JEE Main 2023 Physics question on Units and Measurements

Match List I with List II

LIST ILIST II
A.Young's Modulus (Y)I.[ML−1T−1][M L^{-1} T^{-1}]
B.Co-efficient of Viscosity (η\eta)II.[ML2T−1][M L^2 T^{-1}]
C.Planck's Constant (h)III.[ML−1T−2][M L^{-1} T^{-2}]
D.Work Function (ϕ\phi)IV.[ML2T−2][M L^2 T^{-2}]


Choose the correct answer from the options given below:
  1. A.
    A-II, B-III, C-IV, D-I
  2. B.
    A-I, B-III, C-IV, D-II
  3. C.
    A-III, B-I, C-II, D-IV
  4. D.
    A-I, B-II, C-III, D-IV
Show answer and solution

Correct option: C

Solution

Young's Modulus = Stress/Strain = Force/Area = [MLT⁻²]/[L²] = [ML⁻¹T⁻²] → III.

Coefficient of Viscosity from F = ηA(dv/dz): η = F·z/(A·v) = [MLT⁻²·L]/[L²·LT⁻¹] = [ML⁻¹T⁻¹] → I.

Planck's Constant h = E/ν = [ML²T⁻²]/[T⁻¹] = [ML²T⁻¹] → II.

Work Function is energy, so [ML²T⁻²] → IV. This gives A-III, B-I, C-II, D-IV, which is option 3.

[JEE Main 2023 · 25 Jan · Shift 2]

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