Dimensional formula of resistivity is

  • A

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

  • B

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

  • C

    $\left[ {ML{A^{ - 2}}{T^{ - 3}}} \right]$

  • D

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

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A famous relation in physics relates 'moving mass' $m$ to the 'rest mass' $m_{0}$ of a particle in terms of its speed $v$ and the speed of light, $c .$ (This relation first arose as a consequence of special relativity due to Albert Einstein). A boy recalls the relation almost correctly but forgets where to put the constant $c$. He writes:

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Guess where to put the missing $c$