Which of the following organisms belongs to the Kingdom $Monera$?

$A$ small square loop of wire of side $l$ is placed inside a large square loop of side $L$ $(L \gg l)$. If the loops are coplanar and their centres coincide,the mutual inductance of the system is directly proportional to :

If $R$ is an equivalence relation on a set $A$,then $R^{-1}$ is

$A$ certain prism is found to produce a minimum deviation of $38^{\circ}$. It produces a deviation of $44^{\circ}$ when the angle of incidence is either $42^{\circ}$ or $62^{\circ}$. What is the angle of incidence when it is undergoing minimum deviation? (in degrees)

The truth table for the system of four $NAND$ gates as shown in the figure is:

Lenz's law is a consequence of the law of conservation of: