The time dependence of a physical quantity $P$ is given by $ P = P_0 exp^{(-\alpha t^{2})} $ where $\alpha$ is a constant and $t$ is time. The constant $\alpha$ 
  • A
    Is a dimension less
  • Bhas dimensions $T^{-2}$
  • Chas dimensions of $P$
  • Dhas dimensions $T^2$
AIPMT 1993, Easy
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