Neet 2025 PYQ

$AB$ is a part of an electrical circuit (see figure). The potential difference $V_A-V_B$ at the instant when current $i=2\text{A}$ and is increasing at a rate of $1\text{amp / second}$ is:

A $2\text{amp}$ current is flowing through two different small circular copper coils having radii ratio $1:2$. The ratio of their respective magnetic moments will be:

In a certain camera, a combination of four similar thin convex lenses are arranged axially in contact. Then the power of the combination and the total magnification in comparison to the power ($p$) and magnification ($m$) for each lens will be, respectively:

An oxygen cylinder of volume $30\text{litre}$ has $18.20\text{moles}$ of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to $11\text{atmospheric pressure}$ at temperature $27^{\circ }\text{C}$. The mass of the oxygen withdrawn from the cylinder is nearly equal to:[Given, $R=\frac{100}{12}{\text{J mol}}^{-1}{\text{K}}^{-1}$, molecular mass of ${\text{O}}_2=32$, $1\text{atm pressure}=1.01\times 10^5{\text{N/m}}^2$ ]

In some appropriate units, time ($t$) and position ($x$) relation of a moving particle is given by $t=x^2+x$. The acceleration of the particle is: