Physics Units, Dimensions and Measurement JEE Main 2025 - ( Units and Dimensions ) MCQ (Single Correct)

Match the LIST-I with LIST-II

LIST-I

LIST-II

A.

Boltzmann constant

I

B

Coefficient of viscosity

II

C

Planck's constant

III

D

Thermal conductivity

IV

Choose the correct answer from the options given below:

A
A - III, B - IV, C - I, D- II
B
A - III, B - IV, C - II, D – I
C
A - III, B - II, C - I, D – IV
D
A - II, B - III, C - IV, D - I

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Text Solution

Verified by Experts
The correct answer is:
A

Explanation of Dimensional Analysis
In order to match the quantities from LIST-I with their respective dimensions in LIST-II, we need to analyze their dimensional formulas:
Boltzmann Constant [k]:

The equation relating pressure , volume (V), number of moles (N ), and temperature ( T ) gives us:

This corresponds to option III.
Coefficient of Viscosity [ ]:

The coefficient of viscosity can be defined using the relation:

This corresponds to option IV.
Planck's Constant [h]:

The relationship between energy (E) and frequency (f) gives the dimensional formula:

This corresponds to option I.
Thermal Conductivity [k]:

From the heat conduction equation, we get:

This corresponds to option II.
To conclude, the correct matches are:

A – III B - IV

C – I D - II
This analysis ensures each physical quantity is aligned with its correct dimensional

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