JEE Main 2023 · 29 Jan · Shift 1

JEE Main 2023 Physics question on Units and Measurements

Match List I with List II:

List I (Physical Quantity)List II (Dimensional Formula)
A. Pressure gradientI. [M0L2T−2][M^0L^{2}T^{-2}]
B. Energy densityII. [M1L−1T−2][M^1L^{-1}T^{-2}]
C. Electric FieldIII. [M1L−2T−2][M^1L^{-2}T^{-2}]
D. Latent heatIV. [M1L1T−3A−1][M^1L^1T^{-3}A^{-1}]


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

Correct option: B

Solution

Pressure gradient = Pressure/length = [ML⁻¹T⁻²]/[L] = [ML⁻²T⁻²] → matches III.

Energy density = Energy/Volume = [ML²T⁻²]/[L³] = [ML⁻¹T⁻²] → matches II.

Electric Field = Force/Charge = [MLT⁻²]/[AT] = [MLT⁻³A⁻¹] → matches IV.

Latent heat = Heat/mass = [ML²T⁻²]/[M] = [M⁰L²T⁻²] → matches I.

So the correct matching is A-III, B-II, C-IV, D-I, which is option 2.

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