List of top Questions asked in JEE Main

Which of the following statement is INCORRECT
A metallic rod of length 4 m is rotating about perpendicular bisector of the rod with angular velocity of 2 rad/s in presence of transverse magnetic field of 0.5 T. Potential difference developed across ends of rod is
Instantaneous current in a circuit is \(i(t)=[6+\sqrt54sin(2\pi + \pi/3)]\) A RMS value of current is
The 50th word in the dictionary using the letters B, B, H, J, O is:
The number of real solution x|x + 5| + 2|x + 7| - 2 = 0 is
How many of the following have zero dipole moment $H_2S, CH_4, NH_3, BF_3, SO_2, NF_3$
In an atom, how many electrons can have
(i) n = 4 (ii) m1 =1 (iii) ms = ½
Number of π bonds present in product B is:
π bonds present in product B is
Which of the following molecule is an acidic oxide?
Equanil drug is used for which disease?
Angular momentum of an electron in an orbit of radius R of a hydrogen atom is directly proportional to
Shortest wavelength in Lyman series has wavelength of 915 À. Longest wavelength of Balmer series has a value of ?
A solid sphere is rolling without slipping. Find the ratio of rotational kinetic energy to total kinetic energy of sphere.
A truck is moving from rest with constant power P. if the displacement of the truck is proportional to t", where t is time, find n.
A block of mass 50 kg is moving with speed of 10 m/s on a rough horizontal surface (friction coefficient of 0.3). Find the kinetic friction acting on the object.
In thermodynamics adiabatic process, pressure is directly proportional to cube of absolute temperature. Find $\frac{C_P}{C_V} $for the gas.
Which postulate of Dalton's theory is wrong
Arrange the following carbocations in increasing order of their stability.
I) \((CH_3)_3C^{\oplus}\)
II) \((CH_3)_2\overset{{\oplus}}{C}H\)
III) \(\overset{{\oplus}}{C}H_3\)
IV) \(CH_3\overset{{\oplus}}{C}H_2\)
In a hydraulic lift force F is applied to balance 10 N load, diameter of effort arm is 14 cm and load arm is 1.4 cm. The F is equal to
Sum of O atoms in A and B is ?
Sum of O atoms in A and B is ?
In sonometer, fundamental frequency changes from 400 Hz to 500 Hz keeping same tension. Find percentage change in length.
For what boolean values of A, B & C the given logic gate gives output of zero?
boolean values of A, B & C
20R resistance wire is cut into 10 equal parts. Now each part first is connected in series and then in parallel. Find ratio of equivalent resistance in both cases (Rseries : Rparallel)
In group A there are 4 men and 5 women and in group B there are 5 men and 4 women, if 4 people are selected from each group. Find a number of ways to select 4 men and 4 women.
If $f(x)= x^5 + 2x^3 + 3x + 1$ and $g(f(x)) = x,$ then $\frac{g(1)}{g’(1)}$ is equal to