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Physics · 2023 · 31 Jan · Shift 2

28 questions from this JEE Main paper

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2023 · 31 Jan · Shift 2
Physics

Physics · 2023 · 31 Jan · Shift 2

28 questions from this JEE Main paper

Properties of Matter2 questions Heat and Thermodynamics3 questions Atoms and Nuclei2 questions Dual Nature of Radiation1 questions Current Electricity2 questions Electromagnetic Waves1 questions Gravitation1 questions Electrostatics1 questions Laws of Motion1 questions Magnetics1 questions Geometrical Optics1 questions Units and Measurements1 questions Alternating Current2 questions Circular Motion2 questions Wave Optics1 questions Motion in A Plane1 questions Waves1 questions Capacitor2 questions Rotational Motion1 questions Center of Mass1 questions

Q45.For a solid rod, the Young's modulus of elasticity is $3.2 \times 1 0^{11} Nm^{- 2}$ and density is $8 \times 1 0^{3} kg m^{- 3}$ . The velocity of longitudinal wave in the rod will be.
Physics · Properties of Matter · MCQ
Q46.Heat energy of $735 J$ is given to a diatomic gas allowing the gas to expand at constant pressure. Each gas molecule rotates around an internal axis but do not oscillate. The increase in the internal energy of the gas will be :
Physics · Heat and Thermodynamics · MCQ
Q47.The radius of electron's second stationary orbit in Bohr's atom is R. The radius of 3rd orbit will be
Physics · Atoms and Nuclei · MCQ
Q48.If the two metals $A$ and $B$ are exposed to radiation of wavelength $350 nm$ . The work functions of metals $A$ and $B$ are $4.8 eV$ and $2.2 eV$ . Then choose the correct…
Physics · Dual Nature of Radiation · MCQ
Q49.The number of turns of the coil of a moving coil galvanometer is increased in order to increase current sensitivity by $50%$ . The percentage change in voltage sensitivity of the galvanometer will be :
Physics · Current Electricity · MCQ
Q50.Match List I with List II Choose the correct answer from the options given below: Includes table
Physics · Electromagnetic Waves · MCQ
Q51.The $H$ amount of thermal energy is developed by a resistor in $10 s$ when a current of $4 A$ is passed through it. If the current is increased to $16 A$ , the thermal energy developed by the resistor…
Physics · Current Electricity · MCQ
Q52.A body weight $W$ , is projected vertically upwards from earth's surface to reach a height above the earth which is equal to nine times the radius of earth. The weight of the body at that height will be :
Physics · Gravitation · MCQ
Q53.Considering a group of positive charges, which of the following statements is correct ?
Physics · Electrostatics · MCQ
Q54.A body of mass $10 kg$ is moving with an initial speed of $20 m / s$ . The body stops after $5 s$ due to friction between body and the floor. The value of the coefficient of friction is: (Take…
Physics · Laws of Motion · MCQ
Q55.A hypothetical gas expands adiabatically such that its volume changes from 08 litres to 27 litres. If the ratio of final pressure of the gas to initial pressure of the gas is $\frac{16}{81}$ . Then the ratio of $\frac{Cp}{Cv}$ …
Physics · Heat and Thermodynamics · MCQ
Q56.A long conducting wire having a current I flowing through it, is bent into a circular coil of $N$ turns. Then it is bent into a circular coil of $n$ turns. The magnetic field is calculated at the centre of coils in both…
Physics · Magnetics · MCQ
Q57.A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index $\frac{5}{3}$ is poured inside the bucket, then the microscope has to be raised by $30 cm$ to focus the object again. The height of…
Physics · Geometrical Optics · MCQ
Q58.Match List I with List II Choose the correct answer from the options given below: Includes table
Physics · Units and Measurements · MCQ
Q59.Under the same load, wire A having length $5.0 m$ and cross section $2.5 \times 1 0^{- 5} m^{2}$ stretches uniformly by the same amount as another wire B of length $6.0 m$ and a cross section of $3.0 \times 1 0^{- 5} m^{2}$ …
Physics · Properties of Matter · MCQ
Q60.An alternating voltage source $V = 260 sin (628 t$ ) is connected across a pure inductor of $5 mH$ Inductive reactance in the circuit is :
Physics · Alternating Current · MCQ
Q61.A stone of mass $1 kg$ is tied to end of a massless string of length $1 m$ . If the breaking tension of the string is $400 N$ , then maximum linear velocity, the stone can have without breaking the string, while…
Physics · Circular Motion · MCQ
Q62.A body is moving with constant speed, in a circle of radius $10 m$ . The body completes one revolution in $4 s$ . At the end of 3rd second, the displacement of body (in $m$ ) from its starting point is :
Physics · Circular Motion · MCQ
Q63.A water heater of power $2000 W$ is used to heat water. The specific heat capacity of water is $4200 J kg^{- 1} K^{- 1}$ . The efficiency of heater is $70%$ . Time required to heat $2 kg$ of…
Physics · Heat and Thermodynamics · Numerical
Q64.A series $LCR$ circuit consists of $R = 80Ω, X_{L} = 100Ω$ , and $X_{C} = 40Ω$ . The input voltage is 2500 $cos (100 π t) V$ . The amplitude of current, in…
Physics · Alternating Current · Numerical
Q65.Two light waves of wavelengths 800 and $600 nm$ are used in Young's double slit experiment to obtain interference fringes on a screen placed $7 m$ away from plane of slits. If the two slits are separated by $0.35 mm$ …
Physics · Wave Optics · Numerical
Q66.Two bodies are projected from ground with same speeds $40 ms^{- 1}$ at two different angles with respect to horizontal. The bodies were found to have same range. If one of the body was projected at an angle of $6 0^{\circ}$ , with…
Physics · Motion in A Plane · Numerical
Q67.The displacement equations of two interfering waves are given by $y_{1} = 10 sin (ω t + \frac{π}{3}) cm, y_{2} = 5 [sin ω t + 3 cos ω t] cm$ respectively. The amplitude of the resultant wave…
Physics · Waves · Numerical
Q68.For the given circuit, in the steady state, $∣ V_{B} - V_{D} ∣ =$ V. Includes diagram
Physics · Capacitor · Numerical
Q69.Two discs of same mass and different radii are made of different materials such that their thicknesses are $1 cm$ and $0.5 cm$ respectively. The densities of materials are in the ratio $3 : 5$ . The moment of inertia of…
Physics · Rotational Motion · Numerical
Q70.A ball is dropped from a height of $20 m$ . If the coefficient of restitution for the collision between ball and floor is $0.5$ , after hitting the floor, the ball rebounds to a height of $m$ .
Physics · Center of Mass · Numerical
Q71.If the binding energy of ground state electron in a hydrogen atom is $13.6 eV$ , then, the energy required to remove the electron from the second excited state of $Li^{2 +}$ will be : $x \times 1 0^{- 1} eV$ . The…
Physics · Atoms and Nuclei · Numerical
Q72.Two parallel plate capacitors $C_{1}$ and $C_{2}$ each having capacitance of $10 μ F$ are individually charged by a 100 V D.C. source. Capacitor $C_{1}$ is kept connected to the source and a dielectric slab is inserted between…
Physics · Capacitor · Numerical