30 January 2023 physics questions with solutions

Showing 1–10 of 58 questions

• MCQmediumThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  The pressure (P) and temperature (T) relationship of an ideal gas obeys the equation PT² = constant. The volume expansion coefficient of the gas will be:

  Options

  • Option A

    3T²

  • Option B

    3/T²

  • Option C

    3/T³

  • Option D

    3/T

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  JEE Mains30 January 2023Shift 1Morning Shift

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• MCQeasyGeometrical opticsDispersion, Dispersive Power & Prism Combinations

  A thin prism P₁ with an angle 6° and made of glass of refractive index 1.54 is combined with another prism P₂ made from glass of refractive index 1.72 to produce dispersion without average deviation. The angle of prism P₂ is:

  Options

  • Option A

    6°

  • Option B

    1.3°

  • Option C

    7.8°

  • Option D

    4.5°

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  JEE Mains30 January 2023Shift 2Evening Shift

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• NumericmediumWave OpticsYoung's Double-Slit Experiment (YDSE)

  In Young’s double slit experiment, two slits S₁ and S₂ are d distance apart and the separation from slits to screen is D. If two transparent slabs of equal thickness 0.1 mm but refractive indices 1.51 and 1.55 are introduced in the paths from S₁ and S₂ respectively, with λ = 4000 Å, the central bright fringe spot will shift by ______ number of fringes.

  

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  JEE Mains30 January 2023Shift 1Morning Shift

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• NumericmediumSimple Harmonic MotionKinetic Energy, Potential Energy and Conservation of Energy in SHM

  The general displacement of a simple harmonic oscillator is x = A sinωt. Let T be its time period. The slope of its potential energy U–time t curve will be maximum when t = T/β. The value of β is ____.

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  JEE Mains30 January 2023Shift 1Morning Shift

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• NumericmediumWork , Power and EnergyPower & Its Applications

  A body of mass 2 kg is initially at rest. It starts moving unidirectionally under the influence of a source of constant power P. Its displacement in 4 s is (1/3)α²√P m. The value of α will be ______.

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  JEE Mains30 January 2023Shift 2Evening Shift

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• MCQeasyPhotoelectric effect and dual naturePhotoelectric Effect & Einstein's Equation

  A small object at rest absorbs a light pulse of power 20 mW and duration 300 ns. Assuming speed of light as 3 × 10⁸ m s⁻¹, the momentum of the object becomes equal to:

  Options

  • Option A

    0.5 × 10⁻¹⁷ kg m s⁻¹

  • Option B

    2 × 10⁻¹⁷ kg m s⁻¹

  • Option C

    3 × 10⁻¹⁷ kg m s⁻¹

  • Option D

    1 × 10⁻¹⁷ kg m s⁻¹

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  JEE Mains30 January 2023Shift 1Morning Shift

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• MCQmediumProperties of solid and fluidElastic Properties of Solids: Stress, Strain and Elastic Moduli

  Choose the correct relationship between Poisson ratio (σ), bulk modulus (K) and modulus of rigidity (η) of a given solid object:

  Options

  • Option A

    σ = (3K - 2η)/(6K + 2η)

  • Option B

    σ = (6K + 2η)/(3K - 2η)

  • Option C

    σ = (3K + 2η)/(6K + 2η)

  • Option D

    σ = (6K - 2η)/(3K - 2η)

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  JEE Mains30 January 2023Shift 1Morning Shift

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• MCQeasyProperties of solid and fluidSurface Tension, Surface Energy and Their Applications

  The height of liquid column raised in a capillary tube of certain radius when dipped in liquid A vertically is 5 cm. If the tube is dipped in a similar manner in another liquid B of surface tension and density double the values of liquid A, the height of liquid column raised in liquid B would be:

  Options

  • Option A

    0.20 m

  • Option B

    0.5 m

  • Option C

    0.05 m

  • Option D

    0.10 m

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  JEE Mains30 January 2023Shift 1Morning Shift

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• MCQmediumMagnetic effect of currentMagnetic Force on Current carrying conductor

  A massless square loop, of wire of resistance 10 Ω, supporting a mass of 1 g, hangs vertically with one of its sides in a uniform magnetic field of 10³ G directed outwards in the shaded region. A dc voltage V is applied to the loop. For what value of V will the magnetic force exactly balance the weight of the supporting mass? [Side of loop = 10 cm, g = 10 m s⁻²]

  

  Options

  • Option A

    0.1 V

  • Option B

    100 V

  • Option C

    1 V

  • Option D

    10 V

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• NumericmediumCurrent electricityCircuit Theory & Kirchhoff’s Laws

  In the following circuit, the magnitude of current I₁ is _____ A.

  

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  JEE Mains30 January 2023Shift 1Morning Shift

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