JEE Main 202524 Jan, Morning shift

Physics 24Chemistry 20

Physics

Q26For an experimental expression y=(32.3×1125)/27.4, where all the digits are significant. Then to report the value of y we should writeUnits and Measurements
Q27A force F=α+β x² acts on an object in the x-direction. The work done by the force is 5 J when the object is displaced by 1 m. If the constant α=1 N then β…Work, Energy and Power
Q28An ideal gas goes from an initial state to final state. During the process, the pressure of gas increases linearly with temperature. A. The work done by gas…Thermodynamics
Q29A uniform solid cylinder of mass 'm' and radius 'r' rolls along an inclined rough plane of inclination 45°. If it starts to roll from rest from the top of the…Rotational Motion
Q30An air bubble of radius 0.1 cm lies at a depth of 20 cm below the free surface of a liquid of density 1000 kg/m³. If the pressure inside the bubble is 2100…Properties of Solids and Liquids
Q31Consider the following statements: A. The junction area of solar cell is made very narrow compared to a photo diode. B. Solar cells are not connected with any…Electronic Devices
Q32A particle is executing simple harmonic motion with time period 2 s and amplitude 1 cm. If D and d are the total distance and displacement covered by the…Oscillations and Waves
Q33A thin plano convex lens made of glass of refractive index 1.5 is immersed in a liquid of refractive index 1.2. When the plane side of the lens is silver…Optics
Q34The amount of work done to break a big water drop of radius 'R' into 27 small drops of equal radius is 10 J. The work done required to break the same big drop…Properties of Solids and Liquids
Q35Consider a parallel plate capacitor of area A (of each plate) and separation 'd' between the plates. If E is the electric field and ε₀ is the permittivity of…Electrostatics
Q36An electron of mass 'm' with an initial velocity v=v₀ i (v₀>0) enters an electric field E=-E₀ k. If the initial de Broglie wavelength is λ₀, the value after…Dual Nature of Matter and Radiation
Q37A car of mass 'm' moves on a banked road having radius 'r' and banking angle θ. To avoid slipping from banked road, the maximum permissible speed of the car…Laws of Motion
Q38An alternating current is given by I=I A sin ω t+I B cos ω t. The r.m.s current will beElectromagnetic Induction and Alternating Currents
Q39A parallel plate capacitor was made with two rectangular plates, each with a length of l=3 cm and breath of b=1 cm. The distance between the plates is 3 μ m…Electrostatics
Q40What is the relative decrease in focal length of a lens for an increase in optical power by 0.1D from 2.5D? ['D' stands for dioptre]Optics
Q41During the transition of electron from state A to state C of a Bohr atom, the wavelength of emitted radiation is 2000 Å and it becomes 6000 Å when the…Atoms and Nuclei
Q42An object of mass 'm' is projected from origin in a vertical xy plane at an angle 45° with the x-axis with an initial velocity v₀. The magnitude and direction…Rotational Motion
Q43A plano-convex lens having radius of curvature of first surface 2 cm exhibits focal length of f₁ in air. Another plano-convex lens with first surface radius…Optics
Q44The Young's double slit interference experiment is performed using light consisting of 480 nm and 600 nm wavelengths to form interference patterns. The least…Optics
Q45A satellite is launched into a circular orbit of radius 'R' around the earth. A second satellite is launched into an orbit of radius 1.03 R. The time period…Gravitation
Q46A current of 5A exists in a square loop of side 1/(2) m. Then the magnitude of the magnetic field B at the centre of the square loop will be p×10⁻⁶ T. where…Magnetic Effects of Current and Magnetism
Q48A wire of resistance 9 Ω is bent to form an equilateral triangle. Then the equivalent resistance across any two vertices will be _ _ ohm.Current Electricity
Q49The temperature of 1 mole of an ideal monoatomic gas is increased by 50° C at constant pressure. The total heat added and change in internal energy are E₁ and…Thermodynamics
Q50The least count of a screw guage is 0.01 mm. If the pitch is increased by 75% and number of divisions on the circular scale is reduced by 50%, the new least…Units and Measurements