JEE Main questions
34495 published questions with worked solutions.
- Two rods A and B of identical dimensions are at temperature 30°C. If A is heated up to 180°C and B up to T°C, then the new...
- When 100 g of a liquid A at 100°C is added to 50 g of a liquid B at temperature 75°C, the temperature of the mixture becomes...
- A thermometer graduated according to a linear scale reads a value x_0 when in contact with boiling water, and x_0/3 when in...
- In a photoelectric experiment, the wavelength of the light incident on a metal is changed from 300 nm to 400 nm. The decrease in...
- A pendulum is executing simple harmonic motion and its maximum kinetic energy is K_1. If the length of the pendulum is doubled...
- The mass and the diameter of a planet are three times the respective values for the Earth. The period of oscillation of simple...
- A paramagnetic substance in the form of a cube with sides 1 cm has a magnetic dipole moment of 20 10^ -6 J/T when a magnetic...Not in JEE Advanced syllabus
- A metal ball of mass 0.1 kg is heated up to 500°C and dropped into a vessel of heat capacity 800 JK^ -1 and containing 0.5 kg...
- A particle of mass m is moving in a straight line with momentum p. Starting at time t = 0, a force F = kt acts in the same...
- A 27 mW laser beam has a cross-sectional area of 10 mm^2. The magnitude of the maximum electric field in this electromagnetic...
- A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the...
- In a hydrogen like atom, when an electron jumps from the M-shell to the L-shell, the wavelength of emitted radiation is λ. If an...
- A particle of mass m and charge q is in an electric and magnetic field given by E = 2 i + 3 j; B = 4 j + 6 k. The charged...
- If speed (V), acceleration (A) and force (F) are considered as fundamental units, the dimension of Young's modulus will be:
- A copper wire is wound on a wooden frame, whose shape is that of an equilateral triangle. If the linear dimension of each side of...
- The magnitude of torque on a particle of mass 1 kg is 2.5 Nm about the origin. If the force acting on it is 1 N, and the distance...
- The correct option with respect to the Pauling electronegativity values of the elements is:
- For the equilibrium, 2H_2O ⇌ H_3O^+ + OH^-, the value of ΔG° at 298 K is approximately:
- The radius of the largest sphere which fits properly at the centre of the edge of a body centred cubic unit cell is: (Edge length...Not in JEE Main or NEET syllabus
- K_2HgI_4 is 40% ionised in aqueous solution. The value of its van't Hoff factor (i) is: