28 January Evening Shift physics questions with solutions

Showing 1–10 of 25 questions

• MCQmediumSimple Harmonic Motiontime period of linear shm

  As shown in the figure, a spring is kept in a stretched position with some extension by holding the masses 1 kg and 0.2 kg with a separation more than spring natural length and are released. Assuming the horizontal surface to be frictionless, the angular frequency (in SI unit) of the system is :

  

  Options

  • Option A

    30

  • Option B

    27

  • Option C

    20

  • Option D

    5

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  JEE Mains 202628 January Evening Shift

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• NumericmediumWave OpticsYoung's Double Slit Experiment

  A beam of light consisting of wavelengths 650 nm and 550 nm illuminates the Young’s double slits with separation of 2 mm such that the interference fringes are formed on a screen, placed at a distance of 1.2 m from the slits. The least distance of a point from the central maximum, where the bright fringes due to both the wavelengths coincide, is ______ × 10⁻⁵ m.

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• IntegermediumRotational Motionrotational constrain motion

  A fly wheel having mass 3 kg and radius 5 m is free to rotate about a horizontal axis. A string having negligible mass is wound around the wheel and the loose end of the string is connected to a 3 kg mass. The mass is kept at rest initially and released. Kinetic energy of the wheel when the mass descends by 3 m is ______ J.

  (g = 10 m/s²)

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• MCQmediumUnit dimension and errorDimension and its application

  Match List-I with List-II.

  List-I
  A. Coefficient of viscosity
  B. Surface tension
  C. Pressure
  D. Surface energy

  List-II I. ML⁻¹T⁻² II. ML²T⁻² III. ML⁰T⁻² IV. ML⁻¹T⁻¹

  Choose the correct answer from the options given below :

  Options

  • Option A

    A-I, B-II, C-IV, D-III

  • Option B

    A-IV, B-III, C-I, D-II

  • Option C

    A-I, B-III, C-II, D-IV

  • Option D

    A-IV, B-I, C-II, D-III

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• MCQmediumElectrostaticelectric flux and gauss law

  Identify the correct statements :

  A. Electrostatic field lines form closed loops.

  B. The electric field lines point radially outward when charge is greater than zero.

  C. The Gauss-Law is valid only for inverse-square force.

  D. The workdone in moving a charged particle in a static electric field around a closed path is zero.

  E. The motion of a particle under Coulomb’s force must take place in a plane.

  Choose the correct answer from the options given below :

  Options

  • Option A

    A, B, D, E Only

  • Option B

    A, B, C, D Only

  • Option C

    B, C, D, E Only

  • Option D

    A, C, E Only

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• MCQmediumWave Motionsound wave and its general equation and velocity

  The speed of a longitudinal wave in a metallic bar is 400 m/s. If the density and Young's modulus of the bar material are increased by 0.5% and 1% respectively then the speed of the wave is changed approximately to _____ m/s.

  Options

  • Option A

    399

  • Option B

    398

  • Option C

    402

  • Option D

    401

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• MCQmediumGeometrical opticsprism and thin prism

  For a transparent prism, if the angle of minimum deviation is equal to its refracting angle, the refractive index n of the prism satisfies.

  Options

  • Option A

    √2 < n < 2√2

  • Option B

    1 < n < 2

  • Option C

    n ≥ 2

  • Option D

    √2 < n < 2

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• MCQeasyNuclear physicsNucles and its density radius and mass defect ,binding energy and its curve

  A nucleus has mass number α and radius $R_{\alpha}$. Another nucleus has mass number β and radius $R_{\beta}$. If β = 8α, then $\frac{R_{\alpha}}{R_{\beta}}$ is :

  Options

  • Option A

    2

  • Option B

    8

  • Option C

    1

  • Option D

    0.5

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• MCQmediumNewtons law of motion and FrictionPseudo force related problem

  A small block of mass m slides down from the top of a frictionless inclined surface, while the inclined plane is moving towards left with constant acceleration a₀. The angle between the inclined plane and ground is θ and its base length is L. Assuming that initially the small block is at the top of the inclined plane, the time it takes to reach the lowest point of the inclined plane is ________.

  

  Options

  • Option A

    √[2L/{g sin(2θ) - a₀(1 + cos(2θ))}]

  • Option B

    √[4L/{g sin(2θ) - a₀(1 + cos(2θ))}]

  • Option C

    √[4L/{g cos²θ - a₀ sinθ cosθ}]

  • Option D

    √[2L/{g sinθ - a₀ cosθ}]

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• IntegereasyWave Motionbeat and properties of sound like loudness,pitch

  Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A is loaded with wax, the beat frequency is reduced to 4 beats in 2 s. If the original frequency of tuning fork B is 380 Hz, then the original frequency of tuning fork A is ______ Hz.

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