The Bhopal gas tragedy of $1984$ was caused by:

If $x = \log \left[ \cot \left( \frac{\pi}{4} + \theta \right) \right]$,then the value of $\sinh x$ is

The maximum value of $f(x) = x^4 e^{-x^2}$ is

In contrast to annelids,the Platyhelminthes show:

$A$ thin spherical conducting shell of radius $R$ has charge $q$. Another charge $Q$ is placed at the centre of the shell. The electrostatic potential at a point $P$ at a distance $R/2$ from the centre of the shell is

The phase difference between input and output voltage of a $CE$ circuit is.......$^o$