List of top Questions asked in JEE Main- 2026

Which pair among the following compounds have equal number of hyperconjugation:

Find out the sequence of amino acids from N-terminal to C-terminal in given polypeptide chain. 

 

Match List-I with List-II. 

How many molecules are secondary alcohol? 

An \( \alpha \)-particle having kinetic energy \(7.7\,\text{MeV}\) is approaching a fixed gold nucleus (atomic number \(Z = 79\)). Find the distance of closest approach.
Two electrons are moving in orbits of two hydrogen like atoms with speeds $3\times10^{5}\,\text{m/s}$ and $2.5\times10^{5}\,\text{m/s}$ respectively. If the radii of these orbits are nearly same then the possible order of energy states are ___ respectively.

Match the LIST-I with LIST-II:

List-I List-II 
A.Radio-waveI.is produced by Magnetron valve
B.Micro-waveII.due to change in the vibrational modes of atoms
C.Infrared-waveIII.due to inner shell electrons moving from higher energy level to lower energy level
D.X-rayIV.due to rapid acceleration of electrons

Choose the correct answer from the options given below:

A small bob A of mass m is attached to a massless rigid rod of length 1 m pivoted at point P and kept at an angle of 60° with vertical. At 1 m below P, bob B is kept on a smooth surface. If bob B just manages to complete the circular path of radius R after being hit elastically by A, then radius R is_______ m :

What will be the number of significant figures in the sum of \( 2.34,\; 12.1,\; \text{and } 0.056 \)?
If a satellite orbiting the Earth is 9 times closer to the Earth than the Moon, what is the time period of rotation of the satellite? Given rotational time period of Moon = 27 days and gravitational attraction between the satellite and the Moon is neglected.
Consider the following electromagnetic waves: wave A :- wavelength = \(400\,\text{nm}\)
wave B :- frequency = \(10^{16}\,\text{Hz}\)
wave C :- wave number = \(10^{4}\,\text{cm}^{-1}\)
order of energy is :
Balls are dropped at regular intervals from height 5 m. If the first ball touches the ground when \(6^{th}\) ball is about to be dropped, find the height of \(4^{th}\) ball above the ground at the same instant :
Find electric field intensity \( \vec{E} \) at the centre of the circle shown in the figure.
Electric current in a circuit is given by \(i = i_0 \frac{t}{T}\), then find the rms current for period t = 0 to t = T :
In a H-like ion, ratio of speed of electron in two orbit is 3 : 2, then ratio of energies in these orbits should be :

Diagram shows three arrangements of dielectric in a capacitor. Arrange the capacitors in increasing order of capacitance between A and B if $K_1>K_2$. 

Match the column with the correct numerical values of energy/heat in column-II (R is universal gas constant)

Find capacitance $C$ for the given circuit.
Given: \( L = 20\text{ H}, \quad R = 100\Omega, \quad \omega = 100\text{ rad/s} \)
The applied voltage and current are: \[ V = V_0 \sin \omega t, \quad i = i_0 \sin \omega t \]

If initially the force on \(m_0\) is \(F_0\). When the positions of \(4m\) and \(3m\) are interchanged, the force becomes \(F'\). If \[ \frac{F_0}{F'}=\frac{\alpha}{\sqrt{5}}, \] find \(\alpha\).
In a meter bridge, two balancing resistances are \( 30 \, \Omega \) and \( 20 \, \Omega \). If the galvanometer shows zero deflection for the jockey's contact point \( P \), then find the length \( A P \).
Choose correct option :
(A) Number of photons required for a light beam of 2000 pm wavelength and 1 Joule energy is \(1.01 \times 10^{16}\).
(B) Light with wavelength 300 nm has energy \(E_1\) and for wavelength 900 nm has energy \(E_2\), then \(E_1/E_2 = 1/3\).
(C) Frequency of light is \(4.5 \times 10^{16}\) Hz then its wavelength is \(6.7 \times 10^{-9}\) m.
(D) If electrons and protons are accelerated by same potential difference, then their de-Broglie wavelength are equal.
Internal energy of a gas is given as U = 3nRT. 1 mole of He gas takes 126 J of heat and its temperature rises by 4°C. Atmospheric pressure is \(P_0 = 10^5\) Pa and area of piston is 17 cm\(^2\). Find distance moved by piston.
A particle starts moving from time \(t=0\) and its coordinate is given as \[ x(t)=4t^3-3t. \] Consider the following statements:
[A.] The particle returns to its original position (origin) \(0.866\) units later.
[B.] The particle is \(1\) unit away from origin at its turning point.
[C.] Acceleration of the particle is non-negative.
[D.] The particle is \(0.5\) units away from origin at its turning point.
[E.] The particle never turns back as acceleration is non-negative.
Choose the correct answer from the options given below:
Two spheres having equal mass \( m \), charge \( q \), and radius \( R \), are moving towards each other. Both have speed \( u \) at an instant when the distance between their centers is \( 4R \). Find the minimum value of \( u \) so that they touch each other.
The electric field of an electromagnetic wave travelling through a medium is given by \[ \vec{E}(x,t)=25\sin(2\times10^{15}t-10^{7}x)\,\hat{n}. \] Then the refractive index of the medium is ________. (All given measurements are in SI units)