List of top Physics Questions asked in JEE Main

A 90 kg body placed at $ 2R $ distance from the surface of the earth experiences gravitational pull of:
($ R $ = Radius of Earth, $ g = 10 \, \text{ms}^{-2} $).

Five charges +q, +5q, –2q, +3q and –4q are situated as shown in the figure. The electric flux due to this configuration through the surface S is

When unpolarized light is incident at an angle of 60° on a transparent medium from air. The reflected ray is completely polarized. The angle of refraction in the medium is

Given below are two statements:
Statement (I): When an object is placed at the centre of curvature of a concave lens, image is formed at the centre of curvature of the lens on the other side.
Statement (II): Concave lens always forms a virtual and erect image.
In the light of the above statements, choose the correct answer from the options given below:

In an experiment to measure the focal length (f) of a convex lens, the magnitude of object distance (x) and the image distance (y) are measured with reference to the focal point of the lens. The y-x plot is shown in figure.
The focal length of the lens is_____cm.

Two identical conducting spheres P and S with charge Q on each, repel each other with a force 16N. A third identical uncharged conducting sphere R is successively brought in contact with the two spheres. The new force of repulsion between P and S is :

Given below are two statements:
Statement I: When the speed of liquid is zero everywhere, the pressure difference at any two points depends on the equation $$ P_1 - P_2 = \rho g (h_2 - h_1). $$ Statement II: In the ventury tube shown, $$ 2gh = v_1^2 - v_2^2. $$

In the light of the above statements, choose the most appropriate answer from the options given below.

During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of $\frac{C_p}{C_v}$ for the gas is :

A charge q is placed at the center of one of the surface of a cube. The flux linked with the cube is :-

There are two cubical Gaussian surface carrying charges as shown. Find ratio of fluxes through surface $C_1$ and $C_2$:

A straight magnetic strip has a magnetic moment of $ 44 \, \text{A m}^2 $. If the strip is bent in a semicircular shape, its magnetic moment will be $ \dots $ A m$^2$. \[ \text{(Given } \pi = \frac{22}{7} \text{)} \]

The resistance per centimeter of a meter bridge wire is $ r $, with $ X \, \Omega $ resistance in the left gap. Balancing length from the left end is at 40 cm with 25 $ \Omega $ resistance in the right gap. Now the wire is replaced by another wire of $ 2r $ resistance per centimeter. The new balancing length for the same settings will be at:

The dimensions of angular impulse is equal to :

A real gas within a closed chamber at $ 27^\circ \text{C} $ undergoes the cyclic process as shown in the figure. The gas obeys $ PV^3 = RT $ equation for the path $ A $ to $ B $. The net work done in the complete cycle is (assuming $ R = 8 \, \text{J/mol K} $):

A long straight wire of circular cross-section (radius $ a $) is carrying a steady current $ I $. The current $ I $ is uniformly distributed across this cross-section. The magnetic field is:

The mass defect in a particular reaction is $ 0.4 \, \text{g} $. The amount of energy liberated is $ n \times 10^7 \, \text{kWh} $, where $ n = $ _____. (speed of light $ = 3 \times 10^8 \, \text{m/s} $)

In an experiment to measure focal length ($f$) of a convex lens, the least counts of the measuring scales for the position of the object ($u$) and for the position of the image ($v$) are $ \Delta u $ and $ \Delta v $, respectively. The error in the measurement of the focal length of the convex lens will be:

Given below are two statements:
Statement 1: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water.
Statement 2: If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water.
In the light of the above statements, choose the most appropriate option from the options given below:

A simple pendulum is placed at a place where its distance from the earth's surface is equal to the radius of the earth. If the length of the string is 4 m, then the time period of small oscillations will be _____ s. [take $ g = \pi^2 \, m/s^2 $]

A Zener diode of breakdown voltage 10V is used as a voltage regulator as shown in the figure. The current through the Zener diode is

Two identical spheres each of mass 2 kg and radius 50 cm are fixed at the ends of a light rod so that the separation between the centers is 150 cm. Then, moment of inertia of the system about an axis perpendicular to the rod and passing through its middle point is $\frac{x}{20}$ kg m³ , where the value of x is ____.

A circular coil having 200 turns, $2.5 \times 10^{-4} \text{ m}^2$ area and carrying 100 $\mu$A current is placed in a uniform magnetic field of 1 T. Initially the magnetic dipole moment ($\vec{M}$) was directed along $\vec{B}$. Amount of work, required to rotate the coil through $90^\circ$ from its initial orientation such that $\vec{M}$ becomes perpendicular to $\vec{B}$, is ________ $\mu$J.

Given below are two statements:
Statement I: In an LCR series circuit, current is maximum at resonance.
Statement II: Current in a purely resistive circuit can never be less than that in a series LCR circuit when connected to the same voltage source.
In the light of the above statements, choose the correct from the options given below.

The refractive index of prism is µ = √3 and the ratio of the angle of minimum deviation to the angle of prism is one. The value of angle of prism is ______^o.

Four particles A, B, C, D of mass $\frac{m}{2}$, $m$, $2m$, $4m$ have the same momentum, respectively. The particle with maximum kinetic energy is: