NEET 2021 Question Paper Mock Test

In a potentiometer circuit a cell of EMF $1.5\text{V}$ gives balance point at $36\text{cm}$ length of wire. If another cell of EMF $2.5\text{V}$ replaces the first cell, then at what length of the wire, the balance point occurs?

The escape velocity from the Earth’s surface is $v$. The escape velocity from the surface of another planet having a radius, four times that of Earth and same mass density is:

A cup of coffee cools from $90^{\circ }\text{C}$ to $80^{\circ }\text{C}$ in $t$ minutes, when the room temperature is $20^{\circ }\text{C}$. The time taken by a similar cup of coffee to cool from $80^{\circ }\text{C}$ to $60^{\circ }\text{C}$ at a room temperature same at $20^{\circ }\text{C}$ is:

A capacitor of capacitance $C$ is connected across an AC source of voltage $V$, given by $V=V_0\sin \omega t$. The displacement current between the plates of the capacitor, would then be given by:

A small block slides down on a smooth inclined plane, starting from rest at time $t=0$. Let $S_n$ be the distance travelled by the block in the interval $t=n-1$ to $t=n$. Then, the ratio $\frac{S_n}{S_{n+1}}$ is: