$A$ Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is

The minimum value of $(x-\alpha)(x-\beta)$ is

The thermo emf of a thermocouple is given by $E = aT + bT^2$,where $\frac{a}{b} = -200^{\circ}C$. If the cold junction is kept at $30^{\circ}C$,then the inversion temperature is ($\varepsilon$ in volt,$T$ in centigrade). (in $K$)

Which is the important site for the formation of glycoproteins and glycolipids?

The major product in the following reaction is:

If $N$ denotes the set of all positive integers and if $f: N \rightarrow N$ is defined by $f(n) =$ the sum of positive divisors of $n$,then $f(2^k \cdot 3)$,where $k$ is a positive integer,is