In the circuit shown in the figure,the potential difference across the $4.5\,\mu F$ capacitor is ....... $V$.

Which of the following is a characteristic of a prokaryotic cell?

Which of the following has the lowest boiling point?

Which metal is protected by a layer of its own oxide?

Water from a tap emerges vertically downwards with initial velocity $4 ~m/s$. The cross-sectional area of the tap is $A$. The flow is steady and pressure is constant throughout the stream of water. The distance $h$ vertically below the tap, where the cross-sectional area of the stream becomes $\frac{2}{3} A$, is $(g=10 ~m/s^2)$ (in $~m$)

$\frac{\sin \theta}{1 - \cot \theta} + \frac{\cos \theta}{1 - \tan \theta} = $