NEET 2023 Question Paper Mock Test

In the figure shown here, what is the equivalent focal length of the combination of lenses? (Assume all layers are thin, $R=20\text{cm}$, outer lenses $\mu =1.6$, inner lens $\mu =1.5$)

An electric dipole is placed as shown in the figure. The electric potential (in $10^2\text{V}$) at point P due to the dipole is ($K=\frac{1}{4\pi {ϵ}_0}$):

A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity $4{\text{m s}}^{-1}$. The ball strikes the water surface after $4\text{s}$. The height of the bridge above the water surface is ($g=10{\text{m s}}^{-2}$):

Calculate the maximum acceleration of a moving car so that a body lying on the floor of the car remains stationary. The coefficient of static friction between the body and the floor is $0.15$ ($g=10{\text{m s}}^{-2}$):

$10$ resistors, each of resistance $R$, are connected in series to a battery of EMF $E$ and negligible internal resistance. When they are instead connected in parallel to the same battery, the current increases $n$ times. The value of $n$ is: