Which of the following is used in optical fibres?
- ATotal internal reflection
- BScattering
- CDiffraction
- DRefraction
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If $A = \begin{bmatrix} -1 & 0 \\ 0 & 2 \end{bmatrix}$,then $A^3 - A^2$ is equal to
Match the following:
Column-$I$ Column-$II$ $(1)$ Oxytocin $(p)$ Stimulates the secretion of thyroid hormone $(2)$ Vasopressin $(q)$ Act on the smooth muscles $(3)$ $FSH$ and androgens $(r)$ Stimulates resorption of water $(4)$ $TSH$ $(s)$ Regulate spermatogenesis
| Column-$I$ | Column-$II$ |
| $(1)$ Oxytocin | $(p)$ Stimulates the secretion of thyroid hormone |
| $(2)$ Vasopressin | $(q)$ Act on the smooth muscles |
| $(3)$ $FSH$ and androgens | $(r)$ Stimulates resorption of water |
| $(4)$ $TSH$ | $(s)$ Regulate spermatogenesis |
From which of the following do epithelial tissues originate?
$\lim _{x \rightarrow 0} \frac{\sqrt{1+x^2}-\sqrt{1-x+x^2}}{3^x-1}$ is equal to
The logic gate equivalent to the circuit shown in the figure is
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