JEE Main 20258 Apr, Evening shift

Physics 20Chemistry 22

Physics

Q26Water falls from a height of 200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from the water in the pool. (Take…Thermodynamics
Q27A block of mass 2 kg is attached to one end of a massless spring whose other end is fixed at a wall. The spring-mass system moves on a frictionless horizontal…Oscillations and Waves
Q28A body of mass 2 kg moving with velocity of v in = 3 i + 4 j m s ⁻¹ enters into a constant force field of 6 N directed along positive z-axis. If the body…Laws of Motion
Q29A quantity Q is formulated as X⁻²Y^(+3/2)Z^(-2/5). X, Y and Z are independent parameters which have fractional errors of 0.1, 0.2 and 0.5, respectively in…Units and Measurements
Q30A rod of linear mass density ' λ ' and length 'L' is bent to form a ring of radius 'R'. Moment of inertia of ring about any of its diameter is.Rotational Motion
Q31A convex lens of focal length 30 cm is placed in contact with a concave lens of focal length 20 cm. An object is placed at 20 cm to the left of this lens…Optics
Q32For a nucleus of mass number A and radius R, the mass density of nucleus can be represented asAtoms and Nuclei
Q33Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Work done in moving a test charge between…Electrostatics
Q34Two balls with same mass and initial velocity, are projected at different angles in such a way that maximum height reached by first ball is 8 times higher…Kinematics
Q36Two metal spheres of radius R and 3R have same surface charge density σ. If they are brought in contact and then separated, the surface charge density on…Electrostatics
Q38A concave-convex lens of refractive index 1.5 and the radii of curvature of its surfaces are 30 cm and 20 cm, respectively. The concave surface is upwards and…Optics
Q39A monoatomic gas having γ = 5/3 is stored in a thermally insulated container and the gas is suddenly compressed to (1/8)^(th) of its initial volume. The ratio…Thermodynamics
Q40In a Young's double slit experiment, the source is white light. One of the slits is covered by red filter and another by a green filter. In this caseOptics
Q41The amplitude and phase of a wave that is formed by the superposition of two harmonic travelling waves, y₁(x,t) = 4 sin (kx-ω t) and y₂(x,t) = 2 sin (kx-ω…Oscillations and Waves
Q42A 3 m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to determine Young's modulus. The value…Properties of Solids and Liquids
Q43An infinitely long wire has uniform linear charge density λ = 2 nC/m. The net flux through a Gaussian cube of side length 3 cm, if the wire passes through any…Electrostatics
Q45Two strings with circular cross section and made of same material, are stretched to have same amount of tension. A transverse wave is then made to pass…Oscillations and Waves
Q46A sample of a liquid is kept at 1 atm. It is compressed to 5 atm which leads to change of volume of 0.8 cm ³. If the bulk modulus of the liquid is 2 GPa, the…Properties of Solids and Liquids
Q47An electron is released from rest near an infinite non-conducting sheet of uniform charge density ' -σ '. The rate of change of de-Broglie wave length…Dual Nature of Matter and Radiation
Q50A thin solid disk of 1 kg is rotating along its diameter axis at the speed of 1800 rpm. By applying an external torque of 25π N m for 40 s, the speed…Rotational Motion