JEE Mains 2024 27 Jan Evening Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQmediumUnit dimension and errorDimension and its application

  The equation of state of a real gas is given by (P + a/V²)(V - b) = RT, where P, V and T are pressure. volume and temperature respectively and R is the universal gas constant. The dimensions of a/b² is similar to that of :

  Options

  • Option A

    PV

  • Option B

    P

  • Option C

    RT

  • Option D

    R

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• NumericmediumMagnetic effect of currentbiot savart law and magnetic field due to straight conductor ,arc and ring

  The magnetic field at the centre of a wire loop formed by two semicircular wires of radii R₁ = 2π m and R₂ = 4π m carrying current I = 4A as per figure given below is α × 10⁻⁷ T. The value of α is ______. (Centre O is common for all segments)

  

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• NumericeasyAtomic Structure and X-raysatomic structre and bohr atomic model

  If Rydberg’s constant is R, the longest wavelength of radiation in Paschen series will be α/7R, where α = ________.

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• NumericmediumElectrostaticspotential 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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• MCQmediumRotational Motiontorque and rotational equilibrium

  A heavy iron bar of weight 12 kg is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle 60° with the horizontal, the weight experienced by the man is :

  Options

  • Option A

    6 kg

  • Option B

    12 kg

  • Option C

    3 kg

  • Option D

    6√3 kg

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• A/ReasyElectrostaticsEquipotential Surfaces

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

  Assertion

  Assertion (A) : Work done by electric field on moving a positive charge on an equipotential surface is always zero.

  Reason

  Reason (R) : Electric lines of forces are always perpendicular to equipotential surfaces.

  Options

  • Option A

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

  • Option B

    ((A) is correct but (R) is not correct

  • Option C

    (A) is not correct but (R) is correct

  • Option D

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

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• MCQeasyMagnetic effect of currentmabnetic moment and torque on current carring loop in magnetic field

  A current of 200 μA deflects the coil of a moving coil galvanometer through 60°. The current to cause deflection through π/10 radian is :

  Options

  • Option A

    30 μA

  • Option B

    120 μA

  • Option C

    60 μA

  • Option D

    180 μA

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• MCQmediumThermodyanmicsthermodynmic 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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• 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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