8 April 2023 physics questions with solutions

Showing 1–10 of 60 questions

• MCQmediumCircular Motion

  Two projectiles A and B are thrown with initial velocities of 40 m/s and 60 m/s at angles 30° and 60° with the horizontal respectively. The ratio of their ranges respectively is (g = 10 m s⁻²)

  Options

  • Option A

    2: 3

  • Option B

    3: 2

  • Option C

    4: 9

  • Option D

    1: 1

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  JEE Mains8 April 2023Shift 1Morning Shift

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• NumericmediumCircular Motion

  An organ pipe 40 cm long is open at both ends. The speed of sound in air is 360 m s⁻¹. The frequency of the second harmonic is __________ Hz.

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  JEE Mains8 April 2023Shift 1Morning Shift

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• MCQeasyCircular Motion

  An emf of 0.08 V is induced in a metal rod of length 10 cm held normal to a uniform magnetic field of 0.4 T, when moves with a velocity of:

  Options

  • Option A

    2 m s⁻¹

  • Option B

    20 m s⁻¹

  • Option C

    3.2 m s⁻¹

  • Option D

    0.5 m s⁻¹

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  JEE Mains8 April 2023Shift 2Evening Shift

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• NumericmediumCircular Motion

  An air bubble of diameter 6 mm rises steadily through a solution of density 1750 kg m⁻³ at 0.35 cm s⁻¹. The coefficient of viscosity of the solution is ______ Pa s. [Neglect density of air, g = 10 m s⁻²]

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  JEE Mains8 April 2023Shift 1Morning Shift

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• A/RmediumCircular Motion

  Given below are two statements: one is labelled as Assertion A and the other as Reason R.

  Assertion

  Electromagnets are made of soft iron.

  Reason

  Soft iron has high permeability and low retentivity.

  Options

  • Option A

    A is correct but R is not correct

  • Option B

    Both A and R are correct and R is the correct explanation of A

  • Option C

    Both A and R are correct but R is NOT the correct explanation of A

  • Option D

    A is not correct but R is correct

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  JEE Mains8 April 2023Shift 2Evening Shift

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• NumericmediumCircular Motion

  A series combination of a 100 Ω resistor, 1 H inductor and 6.25 μF capacitor is connected to an AC source. The quality factor of the circuit is ______.

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  JEE Mains8 April 2023Shift 2Evening Shift

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• NumericmediumCircular Motion

  A body of mass 5 kg is moving with a momentum of 10 kg m s⁻¹. Now a force of 2 N acts on the body in the direction of its motion for 5 s. The increase in the Kinetic energy of the body is _________ J.

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  JEE Mains8 April 2023Shift 2Evening Shift

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• MCQmediumCircular Motion

  For the logic circuit shown, the output waveform at Y is: Image

  Options

  • Option A

    Image 1

  • Option B

    Image 2

  • Option C

    Image 3

  • Option D

    Image 4

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  JEE Mains8 April 2023Shift 1Morning Shift

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• NumericmediumCircular Motion

  The moment of inertia of a semicircular ring about an axis through its centre and perpendicular to its plane is (1/x)MR², where R is radius and M is mass. Find x.

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• NumericmediumCircular Motion

  Two transparent media having refractive indices 1.0 and 1.5 are separated by a spherical refracting surface of radius of curvature 30 cm. The centre of curvature of surface is towards denser medium and a point object is placed on the principle axis in rarer medium at a distance of 15 cm from the pole of the surface. The distance of image from the pole of the surface is __________ cm.

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  JEE Mains8 April 2023Shift 2Evening Shift

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