JEE Main202622 January 2026Morning ShiftPhysicsUnits and DimensionsActual
Match the List-I with List-II ( array ||c|l||c||l|| & List-I & & List-II A. & Spring constant & I. & M L² T⁻² K⁻¹ B. & Thermal conductivity & II. & M L⁰ T⁻² C. & Boltzmann constant & III. & M L² T⁻³ A⁻² D. & Inductive reactance & IV. & M L T⁻³ K⁻¹ array ) Choose the correct answer from the options given below:
Options
- AA-II, B-IV, C-I, D-III
- BA-I, B-IV, C-II, D-III
- CA-II, B-I, C-IV, D-III
- DA-III, B-II, C-IV, D-I
Correct answer
A. A-II, B-IV, C-I, D-III
Step-by-step solution
A. Spring constant: F = kx [k] = MLT⁻²/L = ML^0T⁻² II B. Thermal conductivity: Q/t = KA(dT/dx) [K] = ML^2T⁻³/(L^2 K/L) = MLT⁻³K⁻¹ IV C. Boltzmann constant: E = k_BT [k_B] = ML^2T⁻²K⁻¹ I D. Inductive reactance: same dimension as resistance = ML^2T⁻³A⁻² III Matching: A-II, B-IV, C-I, D-III.