An expression for a dimensionless quantity $P$ is given by $P=\frac{\alpha}{\beta} \log _{e}\left(\frac{ kt }{\beta x }\right)$; where $\alpha$ and $\beta$ are constants, $x$ is distance ; $k$ is Boltzmann constant and $t$ is the temperature. Then the dimensions of $\alpha$ will be

  • [JEE MAIN 2022]
  • A
    $[ M ^{0} L ^{-1} T ^{0} ]$
  • B
    $[ ML ^{0} T ^{-2}]$
  • C
    $[ MLT ^{-2}]$
  • D
    $[ ML ^{2} T ^{-2}]$

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In the relation $y = a\cos (\omega t - kx)$, the dimensional formula for $k$ is

The conversion of $1 \;MW$ power in a new system having basic unit of mass, length and time as $10 \;kg , 1 \;dm$ and $1 \;minute$ respectively is:

Match List $I$ with List $II$

List $I$ List $II$
$(A)$ Young's Modulus $(Y)$ $(I)$ $\left[ M L ^{-1} T ^{-1}\right]$
$(B)$ Co-efficient of Viscosity $(\eta)$ $(II)$ $\left[ M L ^2 T ^{-1}\right]$
$(C)$ Planck's Constant $(h)$ $(III)$ $\left[ M L ^{-1} T ^{-2}\right]$
$(D)$ Work Function $(\phi)$ $(IV)$ $\left[ M L ^2 T ^{-2}\right]$

Choose the correct answer from the options given below:

  • [JEE MAIN 2023]

With the usual notations, the following equation ${S_t} = u + \frac{1}{2}a(2t - 1)$ is