A physical quantity → S is defined as → S = ( → E × → B ) μ _ 0 ....

Dimension of& $\dfrac{Force}{Length \times Time}= \dfrac{MLT- 2}{LT} = {MT}^{- 3}$

Dimensions of $\dfrac{Power}{Area} = \dfrac{Force \times Velocity}{Area} = \dfrac{{MLT}^{- 2} \times {LT}^{- 1}}{L2} = {MT}^{- 3}$,~

Dimension of Electric field& \left(E\right), \left[E\right] = {MA}^{- 1}{LT}^{- 3}$</p><p>Dimensions of Magnetic field~\left(B\right); \left[B\right] = {MA}^{- 1}T^{- 2}$

Dimension of magnetic permeability~\left({μ}_{0}\right); \left[{μ}_{0}\right] = {MA}^{- 2}T^{- 2}L</p><p>Therefore,~dimensions of&S,\left[S\right] = \left[\dfrac{EB}{\mu0}\right] = \dfrac{\left({MA}^{- 1}{LT}^{- 3}\right)\left({MA}^{- 1}T^{- 2}\right)}{{MA}^{- 2}T^{- 2}L} = {MT}^{- 3}