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Physics · 2023 · 31 Jan · Shift 1

27 questions from this JEE Main paper

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2023 · 31 Jan · Shift 1
Physics

Physics · 2023 · 31 Jan · Shift 1

27 questions from this JEE Main paper

Motion in A Plane2 questions Magnetic Properties of Matter1 questions Electromagnetic Induction1 questions Electronic Devices1 questions Electrostatics2 questions Current Electricity2 questions Magnetics1 questions Gravitation1 questions Wave Optics1 questions Center of Mass1 questions Alternating Current2 questions Simple Harmonic Motion2 questions Properties of Matter2 questions Laws of Motion1 questions Heat and Thermodynamics2 questions Dual Nature of Radiation1 questions Work Power and Energy1 questions Atoms and Nuclei1 questions Rotational Motion1 questions Electromagnetic Waves1 questions

Q48.The initial speed of a projectile fired from ground is $u$ . At the highest point during its motion, the speed of projectile is $\frac{3}{2} u$ . The time of flight of the projectile is :
Physics · Motion in A Plane · MCQ
Q49.A bar magnet with a magnetic moment $5.0 Am^{2}$ is placed in parallel position relative to a magnetic field of $0.4 T$ . The amount of required work done in turning the magnet from parallel to antiparallel position…
Physics · Magnetic Properties of Matter · MCQ
Q50.Spherical insulating ball and a spherical metallic ball of same size and mass are dropped from the same height. Choose the correct statement out of the following {Assume negligible air friction}
Physics · Electromagnetic Induction · MCQ
Q51.The effect of increase in temperature on the number of electrons in conduction band ( $n_{e}$ ) and resistance of a semiconductor will be as:
Physics · Electronic Devices · MCQ
Q52.Which of the following correctly represents the variation of electric potential $(V)$ of a charged spherical conductor of radius $(R)$ with radial distance $(r)$ from the center?
Physics · Electrostatics · MCQ
Q53.The drift velocity of electrons for a conductor connected in an electrical circuit is $V_{d}$ . The conductor in now replaced by another conductor with same material and same length but double the area of cross section.…
Physics · Current Electricity · MCQ
Q54.A rod with circular cross-section area $2 cm^{2}$ and length $0.4 A$ is wound uniformly with 400 turns of an insulated wire. If a current of $0.4 A$ flows in the wire windings, the total magnetic flux produced…
Physics · Magnetics · MCQ
Q55.At a certain depth "d " below surface of earth, value of acceleration due to gravity becomes four times that of its value at a height $3R$ above earth surface. Where $R$ is Radius of earth (Take $R = 6400 km$ …
Physics · Gravitation · MCQ
Q56.Two polaroide $A$ and $B$ are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another polaroid $C$ is placed between $A$ and $B$ bisecting angle…
Physics · Wave Optics · MCQ
Q57.100 balls each of mass $m$ moving with speed $v$ simultaneously strike a wall normally and reflected back with same speed, in time $t s$ . The total force exerted by the balls on the wall is
Physics · Center of Mass · MCQ
Q58.If $R, X_{L}$ , and $X_{C}$ represent resistance, inductive reactance and capacitive reactance. Then which of the following is dimensionless :
Physics · Alternating Current · MCQ
Q59.The maximum potential energy of a block executing simple harmonic motion is $A/2$ . A is amplitude of oscillation. At $A/2$ , the kinetic energy of the block is
Physics · Simple Harmonic Motion · MCQ
Q60.If 1000 droplets of water of surface tension $0.07 N / m$ , having same radius $(Take π = \frac{22}{7})$ each, combine to from a single drop. In the process the released surface energy is :- $(Take π = \frac{22}{7})$ …
Physics · Properties of Matter · MCQ
Q61.As shown in figure, a $F = 200 N$ garden roller is pushed with a force of $F = 200 N$ at an angle of $3 0^{\circ}$ with horizontal. The normal reaction on the roller is (Given $g = 10 m s^{- 2}$ ) Includes diagram
Physics · Laws of Motion · MCQ
Q62.The pressure of a gas changes linearly with volume from $A$ to $B$ as shown in figure. If no heat is supplied to or extracted from the gas then change in the internal energy of the gas will be Includes diagram
Physics · Heat and Thermodynamics · MCQ
Q63.The correct relation between $γ = \frac{c _{p}}{c _{v}}$ and temperature T is :
Physics · Heat and Thermodynamics · MCQ
Q64.If a source of electromagnetic radiation having power $1 0^{16}$ produces $1 0^{16}$ photons per second, the radiation belongs to a part of spectrum is. (Take Planck constant $h = 6 \times 1 0^{- 34} Js$ )
Physics · Dual Nature of Radiation · MCQ
Q65.A lift of mass $M = 500 kg$ is descending with speed of $2 ms^{- 1}$ . Its supporting cable begins to slip thus allowing it to fall with a constant acceleration of $2 ms^{- 2}$ . The kinetic energy of the…
Physics · Work Power and Energy · Numerical
Q66.For hydrogen atom, $λ_{1}$ and $λ_{2}$ are the wavelengths corresponding to the transitions 1 and 2 respectively as shown in figure. The ratio of $λ_{1}$ and $λ_{2}$ is $\frac{x}{32}$ . The value of $x$ is … Includes diagram
Physics · Atoms and Nuclei · Numerical
Q67.In the figure given below, a block of mass $M = 490 g$ placed on a frictionless table is connected with two springs having same spring constant $(K = 2 N m^{- 1})$ . If the block is… Includes diagram
Physics · Simple Harmonic Motion · Numerical
Q68.The speed of a swimmer is $4 km h^{- 1}$ in still water. If the swimmer makes his strokes normal to the flow of river of width $750 m$ , he reaches a point $750 m$ down the stream on the opposite bank.…
Physics · Motion in A Plane · Numerical
Q69.A solid sphere of mass $7 \times 1 0^{- 3} J$ rolls without slipping on a plane surface. Its kinetic energy is $7 \times 1 0^{- 3} J$ . The speed of the centre of mass of the sphere is $cm s^{- 1}$
Physics · Rotational Motion · Numerical
Q70.Expression for an electric field is given by $E = 4000 x^{2} \hat{i} \frac{V}{m}$ . The electric flux through the cube of side $20 cm$ when placed in electric field (as shown in the… Includes diagram
Physics · Electrostatics · Numerical
Q71.A thin rod having a length of $3 \times 1 0^{- 6} m^{2}$ and area of cross-section $3 \times 1 0^{- 6} m^{2}$ is suspended vertically from one end. The rod is cooled from $21 0^{\circ} C$ to $16 0^{\circ} C$ . After cooling, a…
Physics · Properties of Matter · Numerical
Q72.In a medium the speed of light wave decreases to $0.2$ times to its speed in free space The ratio of relative permittivity to the refractive index of the medium is $x : 1$ . The value of $x$ is . (Given speed of…
Physics · Electromagnetic Waves · Numerical
Q73.Two identical cells, when connected either in parallel or in series gives same current in an external resistance $5 Ω$ . The internal resistance of each cell will be $Ω$ .
Physics · Current Electricity · Numerical
Q74.An inductor of $20 μ F$ , a capacitor of $20 μ F$ and resistance of $20 Ω$ are connected in series with a $220 V$ ac source. If the current is in phase with the emf, the amplitude of current of the…
Physics · Alternating Current · Numerical