List of top Physics Questions asked in JEE Main, KCET

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'.

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.

Resistance of each side is $R$. Find equivalent resistance between two opposite points as shown in the figure.

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.

When rod becomes horizontal find its angular velocity. It is pivoted at point A as shown.

An electron makes transition from higher energy orbit to lower energy orbit in $Li^{2+}$ ion such that $n_1 + n_2 = 4$ and $n_2 - n_1 = 2$. Determine the wavelength of emitted photon in transition (in cm).

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.

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 $x$.

Statement-I: Fluid exerts pressure on the surface of a solid in contact with it. Statement-II: The excess potential energy of molecules at the surface of a liquid leads to surface tension. Which of the following is correct?

Bohr’s radius of H-atom is $ 2.12 \times 10^{-10} $ m. Calculate the energy of electron at this level.

An $ \alpha $-particle with KE 7.9 MeV is projected towards a stationary target nucleus of $ Z = 79 $. Find the distance of closest approach.

Two discs have the same moment of inertia about their axis. Their thicknesses are $t_1$ and $t_2$ and they have the same density. If $ \dfrac{R_1}{R_2} = \dfrac{1}{2} $, find $ \dfrac{t_1}{t_2} $.

Figure beside represents strain versus stress graph for four materials $A, B, C$ and $D$. Which material has maximum Young's modulus?

Among the given options choose the correct energy of transition:

A projectile is projected with speed $v$ at an angle $60^\circ$ with the horizontal. Find the ratio of the difference of kinetic energies at point $C$ (at ground) and point $B$ (at highest point) with the kinetic energy at point $C$ as shown in the diagram:

Find de-Broglie wavelength of an oxygen molecule at $27^\circ$C. Molar mass of oxygen molecule is $32$ g/mole.

Masses $m$ and $2m$ are connected by a massless rod of length $d$. If angular momentum about an axis passing through centre of mass and perpendicular to the rod is $L$, then the angular speed $(\omega)$ of the system is: