If $R$ and $L$ represent respectively resistance and self inductance, which of the following combinations has the dimensions of frequency
$\frac{R}{L}$
$\frac{L}{R}$
$\sqrt {\frac{R}{L}} $
$\sqrt {\frac{L}{R}} $
Frequency is the function of density $(\rho )$, length $(a)$ and surface tension $(T)$. Then its value is
If momentum $(P)$, area $(A)$ and time $(T)$ are taken to be fundamental quantities then energy has dimensional formula
The equation of stationary wave is
$\mathrm{y}=2 \mathrm{a} \sin \left(\frac{2 \pi \mathrm{nt}}{\lambda}\right) \cos \left(\frac{2 \pi \mathrm{x}}{\lambda}\right)$
Which of the following is NOT correct