JEE Main 20254 Apr, Evening shift

Physics 20Chemistry 19

Physics

Q26Two polarisers P₁ and P₂ are placed in such a way that the intensity of the transmitted light will be zero. A third polariser P₃ is inserted in between P₁ and…Optics
Q28Given below are two statements: Statement (I): The dimensions of Planck's constant and angular momentum are same. Statement (II): In Bohr's model electron…Atoms and Nuclei
Q29There are 'n' number of identical electric bulbs, each is designed to draw a power p independently from the mains supply. They are now joined in series across…Current Electricity
Q30Consider a n-type semiconductor in which n e and n h are number of electrons and holes, respectively. (A) Holes are minority carriers (B) The dopant is a…Electronic Devices
Q31Consider a rectangular sheet of solid material of length l = 9 cm and width d = 4 cm. The coefficient of linear expansion is α = 3.1×10⁻⁵ K⁻¹ at room…Properties of Solids and Liquids
Q32A metallic ring is uniformly charged as shown in figure. AC and BD are two mutually perpendicular diameters. Electric field due to arc AB at 'O' is 'E' in…Electrostatics
Q33There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel contains the gas at 8 kPa at 1000 K while…Kinetic Theory of Gases
Q34A cylindrical rod of length 1 m and radius 4 cm is mounted vertically. It is subjected to a shear force of 10⁵ N at the top. Considering infinitesimally small…Properties of Solids and Liquids
Q35A wheel is rolling on a plane surface. The speed of a particle on the highest point of the rim is 8 m/s. The speed of the particle on the rim of the wheel at…Rotational Motion
Q37Displacement of a wave is expressed as x(t) = 5 cos (628t + (π)/2) m. The wavelength of the wave when its velocity is 300 m/s is: (π = 3.14)Oscillations and Waves
Q38A block of mass 25 kg is pulled along a horizontal surface by a force at an angle 45° with the horizontal. The friction coefficient between the block and the…Work, Energy and Power
Q39In an electromagnetic system, a quantity defined as the ratio of electric dipole moment and magnetic dipole moment has dimension of [M^(P) L^(Q) T^(R) A^(S)]…Units and Measurements
Q40Match List - I with List - II. List - I: (A) Isobaric (B) Isochoric (C) Adiabatic (D) Isothermal List - II: (I) Δ Q = Δ W (II) Δ Q = Δ U (III) Δ Q = zero (IV)…Thermodynamics
Q43A finite size object is placed normal to the principal axis at a distance of 30 cm from a convex mirror of focal length 30 cm. A plane mirror is now placed in…Optics
Q44For the determination of refractive index of glass slab, a travelling microscope is used whose main scale contains 300 equal divisions equals to 15 cm. The…Experimental Skills
Q45An object is kept at rest at a distance of 3R above the earth's surface where R is earth's radius. The minimum speed with which it must be projected so that…Gravitation
Q46If an optical medium possesses a relative permeability of 10/(π) and relative permittivity of 1/0.0885, then the velocity of light is greater in vacuum than…Electromagnetic Waves
Q47A solid sphere with uniform density and radius R is rotating initially with constant angular velocity (ω₁) about its diameter. After some time during the…Rotational Motion
Q48An inductor of self inductance 1 H is connected in series with a resistor of 100π ohm and an ac supply of 100π volt, 50 Hz. Maximum current flowing in the…Electromagnetic Induction and Alternating Currents
Q50In a Young's double slit experiment, two slits are located 1.5 mm apart. The distance of screen from slits is 2 m and the wavelength of the source is 400 nm…Optics