Practice/Question bank/JEE Main

JEE Main practice questions

NTA-style Physics, Chemistry and Maths MCQs with solutions. 2,688 questions in the bank.

1. 1A metal sample carrying a current along x-axis with density Jx is subjected to a magnetic field Bz (along z-axis). The electric field Ey…Physics· figure
2. 2Two liquids of densities 1 are mixed in equal volumes. A cube of external dimension 20 cm has an inner cubical portion of side 10 cm whose…Physics· figure
3. 3For D1 forward bias resistance is 20 Ohm and reverse bias resistance is 600 Ohm. For D2 forward bias resistance is 30 Ohm and reverse bias…Physics· figure
4. 4A horizontal conductor is oriented north south and carries some current. A positively charged particle located vertically above it and…Physics· figure
5. 5A small 1 kg mass is launched from the top of a cliff with speed V at an angle of 30° above the horizontal. When the mass reaches the…Physics· figure
6. 6Which one of the following choices is closest to the order of the angular momentum of the Earth (expressed in base MKS units) associated…Physics· figure
7. 7An electromagnetic wave has an electric field given by the expression (in Cartesian co-ordinates): [IMAGE] What is the direction of the…Physics· figure
8. 8A uniform solid cylinder of mass M = 2 kg and radius R = 10 cm is connected about an axis through the centre of the cylinder to a…Physics· figure
9. 9The diagram below shows the lowest four energy levels for an electron in a hypothetical atom. The electron is excited to the -1eV level of…Physics· figure
10. 10A positively charged particle is moved in a straight line to the right from position x = -4 m to position x = -2 m by an external agent.…Physics
11. 11A hollow conducting sphere of inner radius R and outer radius 2R is given a charge Q as shown in the figure, then thePhysics· figure
12. 12Four functions given below describe motion of a particle. (I) y = sin ωt - cos ωt, (II) y = sin3 wt, (III) y = 5 cos [IMAGE], (IV) y = 1 +…Physics· figure
13. 13has four choicesPhysics
14. 14Four metal rods all of identical dimensions and made of same material are welded together at a single point. The configuration is such that…Physics
15. 15Gravitational force between two identical uniform solid gold spheres of radius r each in contact is proportional to n power of r. Then…Physics· figure
16. 16Find the resultant focal length (in cm ) for following system where the common radius of curvature is 15 cm. Glass has refractive index of…Physics· figure
17. 17In figure a wire perpendicular to a long straight wire is moving parallel to it with a speed v = 10 m/s in the direction of the current…Physics· figure
18. 18A mass of material exists in its solid form at its melting temperature 10°C. The following processes then occur to the material: Process-1:…Physics· figure
19. 19In a Young's double slit experiment sources of equal intensities are used. Distance between slits is d and wavelength of light used is λ(λ…Physics· figure
20. 20A mixture of two moles of hydrogen and one mole of argon gas is taken in a closed container at room temperature. Consider the following two…Physics· figure
21. 21The primary purpose of using a parabolic mirror in a reflecting telescope isPhysics
22. 22Three polaroids are kept coaxially. Angle between the first and third polaroid is 90°. Angle between the first and second polaroid is 60°.…Physics· figure
23. 23Statement-1: In a dynamo, it is necessary that coil should be moving and magnet should be stationary and not vice versa. Statement-2:…Physics
24. 24An electron starting from rest and accelerated through V = 20,000 V in an x-ray tube loses half the energy it acquired as it approaches an…Physics· figure