List of top Physics Questions asked in JEE Main

Resolving power of a telescope is $5\times10^{-7}\,\text{rad}$. If wavelength of incident light is $500\,\text{nm}$, find the diameter of the aperture of the telescope.

If the right plate of a parallel plate capacitor is pulled with constant velocity as shown in the figure, find how the rate of change of energy stored in the capacitor depends on the separation $x$.

Two 4-bit binary numbers $A = 1101$ and $B = 1010$ are given in the input logic circuit. Find the output $Y$.

Find the ratio of wave number ($ \nu $) of the 1st line of Balmer series and Brackett series for Hydrogen-like species.

The graph shows stopping potential $V_s$ versus frequency $f$ of incident light for three different metals $X_1, X_2,$ and $X_3$. Choose the metal which will eject photoelectrons with maximum kinetic energy for a given frequency.

An ideal gas has number of moles $n=2$, initial volume $V_0$ and pressure \[ P=P_0\left[1+\left(\frac{V_0}{V}\right)^2\right]^{-1}. \] The gas goes from state $A$ (initial) to $B$ (final) such that volume becomes $3V_0$. Find $T_A-T_B$.

If force $ \vec{F}= 2t\,\hat{i} + 3t^2\,\hat{j} $ acts on a particle of mass $m = 2\,\text{kg}$, find the power at $t = 2\,\text{s}$ if the particle was initially at rest.

Angular momentum of the electron in a hydrogen atom is $\frac{3h}{2\pi}$, then find the energy of the electron in the orbit :-

Velocity versus time graph is given. Find the magnitude of acceleration of the particle at t = 5 s.

Escape velocity on Earth is ve = √(2gR). A planet of half the radius of Earth has the same density as Earth. The escape speed on that planet is ve / N. Find the value of N.

Find the dimensions of √(G h c⁵).

In the circuit shown below, find the voltage across the capacitor in steady state.

8 Hg drops coalesce to form a single new drop. The ratio of final surface energy of the single drop to the total surface energy of the 8 drops is

In the circuit shown below, find the voltage across the capacitor in steady state.

If angular position of a particle is given by $\theta = \frac{t^4}{4} + t^2$. Find angular acceleration at $t = 1s$:

A cube of side length $5\,\text{cm}$ having modulus of rigidity $10^5\,\text{N/m}^2$. The top is pulled by a force $10\,\text{N}$ while the bottom is fixed. Find the displacement of the upper surface of cube (in mm).

If $R=$ resistance, $L=$ inductance, $C=$ capacitance, then the dimension $[ML^2T^{-4}A^{-2}]$ represents

If speed of light is $2.12\times10^8\,\text{m/s}$ in the medium of an equilateral prism, find the minimum angle of deviation.

Two points $A$ and $B$ are $16\,\text{km}$ from the surface of Earth. Point $A$ is above the surface while point $B$ is below the surface. Acceleration due to gravity at $A$ and $B$ are $g_A$ and $g_B$ respectively. Find $\dfrac{g_A}{g_B}$. (Take radius of Earth $R = 6400\,\text{km}$)

LED (light emitting diode) and logic gates circuit is given in figure. For what combination of $A,B,C$ will both LEDs glow?

A ball is dropped from a height $18\,\text{m}$ above the ground. At any moment, if magnitude of acceleration and velocity are same, find its height above ground at that instant.

Find the ratio of $T_1$ and $T_2$ for the system shown.

In the below diagram inductance $L_1 = L_2 = L_3 = L$. Find the ratio of total energy stored in all inductors to energy stored in inductor $L_2$.

In a vernier caliper, 1 main scale division equals $1\,\text{mm}$ and $9$ MSD are divided into $10$ equal parts by the vernier scale. When nothing was present in the jaws, zero of the vernier scale lies to the right of zero of the main scale and the $7^{th}$ division of vernier scale coincides with one of the main scale divisions. Find zero error in the vernier caliper.

Upper wire has cross-section area $0.008\,\text{cm}^2$ and lower wire has area $0.004\,\text{cm}^2$. Find the maximum mass of the pan that can be connected without breaking any wire. Given breaking stress of wire is $\sigma = 8\times10^8\,\text{N/m}^2$.