JEE Mains 2024 29 Jan Morning Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQeasyUnit dimension and errorError and its addition ,subtraction,multipication and division

  The resistance R = V/I where V = (200 ± 5) V and I = (20 ± 0.2) A, the percentage error in the measurement of R is :

  Options

  • Option A

    3.5%

  • Option B

    7%

  • Option C

    3%

  • Option D

    5.5%

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• MCQeasyElectrostaticelectric flux and gauss law

  Two charges of 5Q and -2Q are situated at the points (3a, 0) and (-5a, 0) respectively. The electric flux through a sphere of radius '4a' having center at origin is :

  Options

  • Option A

    2Q/ε₀

  • Option B

    5Q/ε₀

  • Option C

    7Q/ε₀

  • Option D

    3Q/ε₀

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• NumericmediumWave OpticsYoung's Double Slit Experiment

  In a double slit experiment shown in figure, when light of wavelength 400 nm is used, dark fringe is observed at P. If D = 0.2 m. the minimum distance between the slits S₁ and S₂ is ______ mm.

  

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• MCQeasysemiconductorapplication of diode and zener breakdown

  In the given circuit, the breakdown voltage of the Zener diode is 3.0 V. What is the value of I(z)?

  

  Options

  • Option A

    3.3 mA

  • Option B

    5.5 mA

  • Option C

    10 mA

  • Option D

    7 mA

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• MCQeasyWork , Power and Energyconservative force and potential energy

  The potential energy function (in J) of a particle in a region of space is given as U = (2x² + 3y³ + 2z). Here x, y and z are in meter. The magnitude of x - component of force (in N) acting on the particle at point P (1, 2, 3) m is :

  Options

  • Option A

    2

  • Option B

    6

  • Option C

    4

  • Option D

    8

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• NumericmediumMagnetism and matterpole stength ,magnetic moment and magnetic field due to magnet

  The magnetic potential due to a magnetic dipole at a point on its axis situated at a distance of 20 cm from its center is 1.5 × 10⁻⁵ Tm. The magnetic moment of the dipole is__________ Am². (Given : μ₀/4π = 10⁻⁷ TmA⁻¹)

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• MCQeasyProperties of solid and fluidproperties of fluid and surface tension

  Given below are two statements: Statement I : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water. Statement II : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water. In the light of the above statements, choose the most appropriate from the options given below

  Options

  • Option A

    Both Statement I and Statement II are true

  • Option B

    Both Statement I and Statement II are false

  • Option C

    Statement I is true but Statement II is false

  • Option D

    Statement I is false but Statement II is true

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• MCQeasyGeometrical opticsspherical mirror

  A convex mirror of radius of curvature 30 cm forms an image that is half the size of the object. The object distance is :

  Options

  • Option A

    -15 cm

  • Option B

    45 cm

  • Option C

    -45 cm

  • Option D

    15 cm

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• MCQmediumGravitationAcceleration Due to Gravity & Escape Velocity

  At what distance above and below the surface of the earth a body will have same weight, (take radius of earth as R.)

  Options

  • Option A

    (√5 - 1)R

  • Option B

    (√3 - 1)R/2

  • Option C

    R/2

  • Option D

    (√5 - 1)R/2

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• MCQmediumNuclear physicsnuclear fission and fusion ,nuclear reactor

  The explosive in a Hydrogen bomb is a mixture of ₁H², ₁H³ and ₃Li⁶ in some condensed form. The chain reaction is given by

  ₃Li⁶ + ₀n¹ → ₂He⁴ + ₁H³ ₁H² + ₁H³ → ₂He⁴ + ₀n¹

  During the explosion the energy released is approximately

  [Given : M(Li) = 6.01690 amu. M(₁H²) = 2.01471 amu. M(₂He⁴) = 4.00388 amu, and 1 amu = 931.5 MeV]

  Options

  • Option A

    28.12 MeV

  • Option B

    12.64 MeV

  • Option C

    16.48 MeV

  • Option D

    22.22 MeV

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