JEE Mains 2023 physics questions with solutions

Showing 1–10 of 53 questions

• MCQmediumGravitationSatellites, Orbital Motion & Kepler’s Laws

  Choose the incorrect statement about satellite/planet motion:

  Options

  • Option A

    The speed of satellite in a given circular orbit remains constant.

  • Option B

    For a planet revolving around the sun in an elliptical orbit, the total energy of the planet remains constant.

  • Option C

    When a body fall towards earth, the displacement of earth towards the body is negligible.

  • Option D

    The linear speed of a planet revolving around the sun remains constant.

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• MCQmediumNewtons law of motion and Frictionfriction and single block problem

  A 10 kg block on a horizontal surface is pulled by a force F at 30° above the horizontal. For μₛ = 0.25, find F for impending motion. Take g = 10 m s⁻².

  

  Options

  • Option A

    33.3 N

  • Option B

    25.2 N

  • Option C

    20 N

  • Option D

    35.7 N

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• MCQmediumUnit dimension and error

  A cylindrical wire of mass (0.4 ± 0.01) g has length ( 8 ± 0.04) cm and radius (6 ± 0.03) mm . The maximum error in its density will be

  Options

  • Option A

    1%

  • Option B

    3.5 %

  • Option C

    4%

  • Option D

    5%

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• MCQmediumElectromagnetic wave

  The ratio of average electric energy density and total average energy density of electromagnetic wave is: 1

  Options

  • Option A

    2

  • Option B

    1

  • Option C

    3

  • Option D

    1/2

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• NumericmediumCurrent electricityElectrical Instruments: Galvanometer, Ammeter, Voltmeter & Potentiometer

  As shown in the figure, the voltmeter reads 2V across 5 Ω resistor.

  

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• NumericmediumCircular Motionkinematics of circular motion

  A car moves on a circular path of radius 600 m with tangential acceleration equal in magnitude to centripetal acceleration. Starting at 54 km/h, the time for the first quarter revolution is t(1-$e^{-\frac{\pi}{2}}$) s. Find t.

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• MCQmediumElectrostatic

  A dipole comprises of two charged particles of identical magnitude q and opposite in nature. The mass ‘m’ of the positive charged particle is half of the mass of the negative charged particle. The two charges are separated by a distance ‘l’. If the dipole is placed in a uniform electric field ‘ $\vec{E}$ ’; such a way that dipole axis makes a very small angle with the electric field, ‘ $\vec{E}$ ’. The angular frequency of the oscillations of the dipole when released is given by:

  Options

  • Option A

    $\sqrt{\frac{8qE}{3ml}}$

  • Option B

    $\sqrt{\frac{4qE}{ml}}$

  • Option C

    $\sqrt{\frac{4qE}{3ml}}$

  • Option D

    $\sqrt{\frac{8qE}{ml}}$

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• MCQmediumWork , Power and Energyquestion based on work

  Identify the correct statements: (A) Work by a man lifting a bucket from a well is negative. (B) Work by gravity while lifting the bucket is negative. (C) Work by friction on a body sliding down an incline is positive. (D) Work by an applied force on a body moving at uniform velocity on a rough horizontal plane is zero. (E) Work by air resistance on an oscillating pendulum is negative. Choose the correct combination.

  Options

  • Option A

    B and E only

  • Option B

    A and C only

  • Option C

    B, D and E only

  • Option D

    B and D only

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• MCQmediumGeometrical opticslaw of refraction and total internal reflection

  A monochromatic light wave with wavelength λ₁ and frequency ν₁ in air enters another medium. If the angles of incidence and refraction are 45° and 30° respectively, then wavelength λ₂ and frequency ν₂ of the refracted wave are:

  Options

  • Option A

    λ₂ = √2 λ₁, ν₂ = ν₁

  • Option B

    λ₂ = λ₁/√2, ν₂ = ν₁

  • Option C

    λ₂ = 2λ₁, ν₂ = ν₁

  • Option D

    λ₂ = λ₁/2, ν₂ = ν₁

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• MCQeasyWave Motion

  A person observes two moving trains, ‘A’ reaching the station and ‘B’ leaving the station with equal speed of 30 m s⁻¹. If both trains emit sounds with frequency 300 Hz, (Speed of sound: 330 m s⁻¹) approximate difference of frequencies heard by the person will be:

  Options

  • Option A

    33 Hz

  • Option B

    55 Hz

  • Option C

    80 Hz

  • Option D

    10 Hz

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