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A charged particle of charge e and mass m is moving in an electric field $\overrightarrow{E}$ and magnetic field $\overrightarrow{B}$. Construct dimension less quantities and quantities of dimension $[T]^{-1}$

$\begin{array}{1 1} \text{There cannot be a dimension less quantity. quantity of dimension $[T^{-1}]=w$} \\ \text{There cannot be a dimension less quantity. quantity of dimension $[T^{-1}]=\alpha$} \\ \text{There cannot be a dimension less quantity. quantity of dimension $[T^{-1}]=F$} \\ none\;of\; the \;above \end{array} $

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Solution :
There cannot be dimensionless quantity with $e,m,\overrightarrow{E}$ and $\overrightarrow{B}$
Answer : There cannot be a dimension less quantity. quantity of dimension $[T^{-1}]=w$
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