JEE Main questions
34495 published questions with worked solutions.
- A ball having kinetic energy KE, is projected at an angle of 60° from the horizontal. What will be the kinetic energy of ball at...
- The refractive index of the material of a glass prism is 3 . The angle of minimum deviation is equal to the angle of the prism....
- The energy of a system is given as E(t) = ^3 e^ - t , where t is the time and = 0.3 s^ -1 . The errors in the measurement of and...
- In photoelectric effect an em-wave is incident on a metal surface and electrons are ejected from the surface. If the work...
- A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is...
- Match List-I with List-II. List-I: (A) Permeability of free space (B) Magnetic field (C) Magnetic moment (D) Torsional constant...
- 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...
- A galvanometer having a coil of resistance 30 need 20 mA of current for full-scale deflection. If a maximum current of 3 A is to...
- The width of one of the two slits in Young's double slit experiment is d while that of the other slit is xd. If the ratio of the...
- Assertion (A) : The binding energy per nucleon is found to be practically independent of the atomic number A, for nuclei with...
- Water of mass m gram is slowly heated to increase the temperature from T_1 to T_2. The change in entropy of the water, given...
- A plane electromagnetic wave of frequency 20 MHz travels in free space along the +x direction. At a particular point in space and...
- A concave mirror of focal length f in air is dipped in a liquid of refractive index . Its focal length in the liquid will be :
- A massless spring gets elongated by amount x_1 under a tension of 5N. Its elongation is x_2 under the tension of 7N. For the...
- An air bubble of radius 1.0 mm is observed at a depth of 20 cm below the free surface of a liquid having surface tension 0.095...
- A satellite of mass M 2 is revolving around earth in a circular orbit at a height of R 3 from earth surface. The angular momentum...
- A time varying potential difference is applied between the plates of a parallel plate capacitor of capacitance 2.5 . The...
- In a series LCR circuit, a resistor of 300 , a capacitor of 25 nF and an inductor of 100 mH are used. For maximum current in the...
- The effect of temperature on spontaneity of reactions are represented as: H | S | Temperature | Spontaneity (A) + | – | any T |...
- The - Helix and - Pleated sheet structures of protein are associated with its: