Find the value of $V_{AB}$ in the given circuit.

The slopes of the focal chords of the parabola $y^2=32x$,which are tangents to the circle $x^2+y^2=4$,are

Consider the following statements $A$ and $B$. Identify the correct choice in the given answer.
$A$. $p-n, p-p$ and $n-n$ forces between nucleons are not equal and charge dependent.
$B$. In a nuclear reactor,the fission reaction will be in an accelerating state if the value of the neutron reproduction factor $k > 1$.

$A$ rectangular loop has a sliding connector $PQ$ of length $2\ m$ and resistance $10\ \Omega$. It is moving with a speed $5\ m/s$ as shown in the figure. The set-up is placed in a uniform magnetic field of $3\ T$ directed into the plane of the paper. Find the three currents $I_1$,$I_2$,and $I$.

Which of the following statements is incorrect for $Nostoc$ and $Anabaena$?

Which method is used to obtain virus-free plants?