The number of structural isomers for $C_6H_{14}$ is

Sulphur is an important nutrient for optimum growth and productivity in

The straight lines represented by the equation $9x^2 - 12xy + 4y^2 = 0$ are

Identify the correct gland on the basis of the following characteristics:
$(I)$ It is located on the dorsal side of the forebrain.
$(II)$ It plays a very important role in the regulation of the $24$-hour rhythm of our body.
$(III)$ It helps in maintaining the body temperature.
$(IV)$ Its hormone influences metabolism as well as defense capability.

The circuit given below is that of:

$A$ conducting rod of length $L$ rotates with angular speed $\omega$ in a uniform magnetic field of induction $B$ which is perpendicular to its motion. The induced emf developed between the two ends of the rod is