Q173 / 180 · KCET 2024 · Physics

Dimensional formula for activity of radioactive substance is

  • A
    $\left[M^0 L^1 T^{-1}\right]$
  • B
    $\left[\mathrm{M}^0 \mathrm{~L}^{-1} \mathrm{~T}^0\right]$
  • Correct answer
    C
    $\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^{-1}\right]$
  • D
    $\left[\mathrm{M}^{-1} \mathrm{~L}^0 \mathrm{~T}^0\right]$

Solution

Since, activity is defined as the number of disintegration per second. Hence, its dimensional formula is $\left[\mathrm{M}^0 \mathrm{~L}^0 \mathrm{~T}^{-1}\right]$.

Hence, the correct answer is option: 'C'.

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