$DDT$ residues are rapidly passed through food chain causing biomagnification because $DDT$ is:

Which is the most widely cultivated fiber-yielding crop in India?

Which of the following is a part of the pistil (gynoecium)?

According to Graham's law,the rate of diffusion of $CO$,$O_2$,$N_2$,and $CO_2$ follows the order:

An inductor of inductance $L=400\,mH$ and resistors of resistance $R_1=2\,\Omega$ and $R_2=2\,\Omega$ are connected to a battery of emf $E=12\,V$ as shown in the figure. The internal resistance of the battery is negligible. The switch $S$ is closed at $t=0$. The potential drop across $L$ as a function of time is

$\frac{\sin 5 \theta}{\sin \theta}$ is equal to