JEE Mains 2024 27 Jan Evening Shift physics questions with solutions

Showing 1–10 of 30 questions

• NumericmediumWave Opticsdiffraction of light

  A parallel beam of monochromatic light of wavelength 5000 Å is incident normally on a single narrow slit of width 0.001 mm. The light is focused by convex lens on screen, placed on its focal plane. The first minima will be formed for the angle of diffraction of ________ (degree).

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• MCQmediumThermodynamicsthermodynmic process and work done

  During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of Cₚ/Cᵥ for the gas is :

  Options

  • Option A

    5/3

  • Option B

    3/2

  • Option C

    7/5

  • Option D

    9/7

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• NumericmediumElectrostaticpotential energy and electric potential

  The electric potential at the surface of an atomic nucleus (z = 50) of radius 9 × 10⁻¹³ cm is ________ × 10⁶ V.

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• MCQmediumKinematics Part-1 (one dimension)Motion under constant acceleration

  A bullet is fired into a fixed target looses one third of its velocity after travelling 4 cm. It penetrates further D × 10⁻³ m before coming to rest. The value of D is :

  Options

  • Option A

    2

  • Option B

    5

  • Option C

    3

  • Option D

    4

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

  The atomic mass of ₆C¹² is 12.000000 u and that of ₆C¹³ is 13.003354 u. The required energy to remove a neutron from ₆C¹³, if mass of neutron is 1.008665 u, will be :

  Options

  • Option A

    62.5 MeV

  • Option B

    6.25 MeV

  • Option C

    4.95 MeV

  • Option D

    49.5 MeV

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• MCQeasyPhotoelectric effect and dual nature of matterquestion based on photoelectric effect

  The threshold frequency of a metal with work function 6.63 eV is :

  Options

  • Option A

    16 × 10¹⁵ Hz

  • Option B

    16 × 10¹² Hz

  • Option C

    1.6 × 10¹² Hz

  • Option D

    1.6 × 10¹⁵ Hz

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

  Three voltmeters, all having different internal resistances are joined as shown in figure. When some potential difference is applied across A and B, their readings are V₁, V₂ and V₃. Choose the correct option.

  

  Options

  • Option A

    V₁ = V₂

  • Option B

    V₁ ≠ V₃ - V₂

  • Option C

    V₁ + V₂ > V₃

  • Option D

    V₁ + V₂ = V₃

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• MCQeasyNewtons law of motion and Frictiontypes of friction and problem based on it

  Given below are two statements : Statement (I) : The limiting force of static friction depends on the area of contact and independent of materials. Statement (II) : The limiting force of kinetic friction is independent of the area of contact and depends on materials. In the light of the above statements, choose the most appropriate answer from the options given below :

  Options

  • Option A

    Statement I is correct but Statement II is incorrect

  • Option B

    Statement I is incorrect but Statement II is correct

  • Option C

    Both Statement I and Statement II are incorrect

  • Option D

    Both Statement I and Statement II are correct

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• MCQeasyPhotoelectric effect and dual nature of matterquestion based on photoelectric effect

  An object is placed in a medium of refractive index 3. An electromagnetic wave of intensity 6 × 10⁸ W/m² falls normally on the object and it is absorbed completely. The radiation pressure on the object would be (speed of light in free space = 3 × 10⁸ m/s) :

  Options

  • Option A

    36 Nm⁻²

  • Option B

    18 Nm⁻²

  • Option C

    6 Nm⁻²

  • Option D

    2 Nm⁻²

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• A/ReasyUnit dimension and errorvernier callipers and screw gauge

  Given below are two statements : one is labelled as Assertion(A) and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below :

  Assertion

  Assertion (A) : In Vernier calliper if positive zero error exists, then while taking measurements, the reading taken will be more than the actual reading.

  Reason

  Reason (R) : The zero error in Vernier Calliper might have happened due to manufacturing defect or due to rough handling.

  Options

  • Option A

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

  • Option B

    Both (A) and (R) are correct but (R) is not the correct explanation of (A)

  • Option C

    (A) is true but (R) is false

  • Option D

    (A) is false but (R) is true

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