List of top Physics Questions asked in JEE Main

If the string connecting $ m $ and the ground is cut, find the speed with which the $ 2m $ block hits the ground as shown. $ g = 10 \, \text{m/s}^2 $

Choose the correct graph between time period $ T $ and length of pendulum $ l $.

For the given arrangement of charges, find the strength of electric field $ E $ and potential $ V $ at the geometrical center $ O $.

Which of the following is/are true for YDSE experiment?

Three identical liquid drops, each carrying the same charge, coalesce to form a single drop. The ratio of the potential of the large drop and the smaller drop is $ 3^{1/3} $. Then, $ N $ is:

If position vector is given as $\vec{r} = x\hat{i} + y\hat{j} + z\hat{k}$ and if its signs are reversed, then which of the following physical quantity remains unaffected?

Find number of photons emitted per second by a light source of wavelength $663\,\text{nm}$ at power $6\,\text{mW}$. If $h = 6.63 \times 10^{-34}\,\text{Js}$ is $N \times 10^{15}$, then find $N$.

Block of mass $3\,\text{kg}$ is connected to a flywheel of mass $3\,\text{kg}$ and radius $5\,\text{m}$ through a massless string wrapped around the flywheel. Find kinetic energy (in J) of flywheel when block descends by $3\,\text{m}$.

Find time taken by the block to reach the bottom.

Mass number of a nucleus is $\alpha$ and its radius is $R_\alpha$. Radius of another nucleus of mass number $\beta$ is $R_\beta$. If $\beta = 8\alpha$, then find $\dfrac{R_\alpha}{R_\beta}$.

For a particle moving in x-direction according to the relation $x = 4t^3 - 3t$, consider the following statements:

[(a)] At $t = 0.866$, $x = 0$
[(b)] Direction of velocity of particle remains same
[(c)] Direction of velocity of particle changes at $x = -1$
[(d)] Direction of velocity of particle changes at $x = 0.5\,\text{m}$
[(e)] Acceleration is non-negative
Correct statements are:

If percentage increase in Young's modulus $Y$ is $1%$, percentage increase in density of material is $0.5%$ and longitudinal wave traveling in a metallic bar has wave velocity of $400\,\text{m/s}$, then find final velocity of the wave.

A current is flowing along the surface of a long solid cylinder of radius $R$. Select the correct statement(s):

[(A)] Magnetic field ($B$) is minimum along the axis of cylinder
[(B)] Magnetic field ($B$) is minimum at the surface of cylinder
[(C)] Magnetic field ($B$) is maximum at the surface of cylinder
[(D)] Magnetic field ($B$) is maximum along the axis of cylinder
[(E)] Magnetic field ($B$) is same all over the cross section of cylinder

In the given circuit, energy stored in the inductor is $16\,\text{J}$ and power dissipated in resistance is $32\,\text{W}$. Find the value of $\dfrac{X_L}{R}$.

A light ray incident on a slab of refractive index $ \frac{3}{2} $. If the wavelength of the refracted ray is 520 nm, find the wavelength of the incident ray.

Ice is heated from $-20^\circ C$ to $200^\circ C$. Which of the following temperature (T) vs heat (Q) graph is correct ?

If nothing is kept between jaws, zero of Vernier scale lies right of 0 cm of main scale and $4^{th}$ line of Vernier scale matches perfectly with any line of main scale. An object is kept between jaws and zero of Vernier scale crosses $15^{th}$ division of main scale and $5^{th}$ division of Vernier scale exactly matches with any line of main scale. (Least count = 0.1 mm and 1 MSD = 1mm). Find dimension of object :

Two wires of cross sectional area $1 \text{ cm}^2$ and $2 \text{ cm}^2$ and lengths 20 cm and 30 cm are connected to the same load. If their extensions are same, find the ratio of their Young's modulus :

In the system of two discs and a rod of mass 600 g each, a torque of magnitude $43 \times 10^5$ dyne-cm is applied along the axis of rotation as shown in figure. Find the approx angular acceleration about given axis :

As shown in the figure, radius of gyration about the axis shown in $\sqrt{n}$ cm for a solid sphere. Find 'n'.

In YDSE, slit separation $d = 2$ mm, distance between slits and screen $D = 10$ m. Wavelength of light is $\lambda = 6000$\AA. If intensity of light through each slit is $I_0$, find intensity at point directly in front of one of the slits.

On a surface, if photon of wavelength $\lambda$ is incident, the stopping potential is $3.2$ V. If the wavelength incident is $2\lambda$, stopping potential is $0.7$ V. Find $\lambda$.

A solid cylinder of radius $\dfrac{R}{3}$ and length $\dfrac{L}{2}$ is removed along the central axis. Find ratio of initial moment of inertia and moment of inertia of removed cylinder.

In case of meter bridge experiment balance length for $2\Omega$ and $3\Omega$ is $\ell$ and for $x\Omega$ and $3\Omega$ is $(\ell + 10)$ cm. Find $x$.

In a vernier calipers 50 VSD are equal to 48 MSD. 1 MSD is equal to $0.05$ mm. Find least count of this vernier calipers.