JEE Main questions
34495 published questions with worked solutions.
- A wheel initially at rest is subjected to a uniform angular acceleration about its axis. In the first 2 s it rotates through an...
- A body of mass m is taken from the surface of earth to a height equal to twice the radius of earth (Rₑ). The increase in...
- Eight mercury drops, each of radius r, coalesce to form a bigger drop. The surface energy released in this process is _______. (S...
- An ideal gas at pressure P and temperature T is expanding such that PT³=constant. The coefficient of volume expansion of the gas...
- Match List-I with List-II. List-I: A. sin²ωt, B. sin³(2ωt), C. sin(ωt)+cos(πωt), D. cosωt+cos2ωt. List-II: I. Periodic with time...
- A metal rod of length L rotates about one end at origin with a uniform angular velocity ω. The magnetic field radially falls off...
- A particle of charge q and mass m is projected from origin with an initial velocity v= ( v_0 2 x+ v_0 2 y ). There exists a...
- Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The...
- A thin convex lens and a thin concave lens are kept in contact and are co-axial. Which of the following statements is correct for...
- An object AB is placed 15 cm on the left of a convex lens P of focal length 10 cm. Another convex lens Q is now placed 15 cm...
- The maximum intensity in a Young's double slit experiment is I₀. Distance between the slits (d) is 5λ, where λ is the wavelength...
- An electron is travelling with a velocity v in free space and when it enters a medium, its velocity is reduced by 20%. The de...
- Assuming the experimental mass of ¹²₆C as 12 u, the mass defect of ¹²₆C atom is _______ MeV/c². (Mass of proton=1.00727u, mass of...
- In a semiconductor p-n diode, the doping concentrations on p-side and n-side are 10¹⁵ atoms/cm³ and 10¹⁸ atoms/cm³, respectively....Not in JEE Advanced syllabus
- A copper wire of length 3 m is stretched by 3 mm by applying an external force. The volume of the wire is 600×10⁻⁶ m³. The...
- The heat extracted out of x gram of water initially at 50°C to cool it down to 0°C is sufficient to evaporate (1000−x) gram of...
- A series LCR circuit with R=20Ω, L=1.6H and C=40μF is connected to a variable frequency a.c. source. The inductive reactance at...
- When an external resistance of 5Ω is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5Ω...
- A circular loop of radius 20 cm and resistance 2Ω is placed in a time varying magnetic field B=(2t^2+2t+3) T. At t=0, for the...
- Which of the following statement(s) is/are true? A. If two orbitals have the same value of (n+l), the orbital with lower value of...