JEE PHYSICS MCQ: UNITS & MEASUREMENTS

1 Medium

1 of 1

Understanding +4 | -1

Assertion: SI units are logical and coherent.

Reason: SI system of units is a rationalised system.

View answer and explanation

Correct option: B

If both assertion and reason are true but reason is not correct explanation of the assertion.

Option B (If both assertion and reason are true but reason is not correct explanation of the assertion) is correct because both the assertion and reason are true statements, but the reason does not explain why SI units are logical and coherent.

More Questions from UNITS & MEASUREMENTS

Practice All Chapter MCQs →

Assertion :

\sqrt{\frac{\text { Modulus of elasticity }}{\text { Density }}}

has the unit

\mathrm{ms}^{-1} \text {. }

Reason: Acceleration has the dimensions of

\frac{1}{\left(\sqrt{\varepsilon_0 \mu_0}\right) t} \text {. }

The method of dimensional analysis can be used to derive which of the following relations? Statement-I: Dimensions of constant of proportionality of constants can be derived from dimensional method
Statement-II: Numerical value of constant of proportionality can be found from experiments only The dimensions of torque are The physical quantity having the dimensions

\left[ {{\mathrm{M}^{ - 1}}{\mathrm{L}^{ - 3}}{\mathrm{A}^2}{T^3}} \right]

is A quantity X is given by

{\varepsilon _0}L\frac{{\Delta V}}{{\Delta t}},\;

, where

{\varepsilon _0}

is the permittivity of free space, L is a length,

{\Delta V}

is a potential difference and

{\Delta t}

is a time interval. The dimensional formula for X is the same as that of