Which of the following reagents are required to prepare $3$-ethylpentan-$3$-ol?

The differential equation of all circles which pass through the origin and whose centre lies on the $y$-axis is

Fertilization of the egg takes place inside:

If $A = \begin{bmatrix} \cos \alpha & \sin \alpha \\ -\sin \alpha & \cos \alpha \end{bmatrix}$,then verify that $A^{\prime} A = I$.

Consider the situation shown in the figure. The wire $AB$ is sliding on the fixed rails with a constant velocity $v$. If the wire $AB$ is replaced by a semicircular wire of the same chord length,the magnitude of the induced current will

Which of the following is not correct?