Identify the plant shown in the given figure.

Which one of the following statements is $WRONG$ in the context of $X-$rays generated from an $X-$ray tube?

Carbon,silicon,and germanium have four valence electrons each. These are characterized by valence and conduction bands separated by energy band gaps equal to $(E_{g})_{C}$,$(E_{g})_{Si}$,and $(E_{g})_{Ge}$ respectively. Which of the following statements is true?

The line passing through $\left(-1, \frac{\pi}{2}\right)$ and perpendicular to $\sqrt{3} \sin \theta + 2 \cos \theta = \frac{4}{r}$ is :

Calcium is obtained by which of the following methods?

The focal distance of a point on the parabola $y^2 = 16x$ whose ordinate is twice the abscissa,is