JEE Mains 2024 09 Apr Evening Shift physics questions with solutions

Showing 1–10 of 30 questions

• MCQeasyUnit dimension and errorDimension and its application

  The de-Broglie wavelength associated with a particle of mass m and energy E is h/√(2mE). The dimensional formula for Planck's constant is :

  Options

  • Option A

    [ML⁻¹T⁻²]

  • Option B

    [ML²T⁻¹]

  • Option C

    [MLT⁻²]

  • Option D

    [M²L²T⁻²]

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• MCQmediumNuclear physicsnuclear fission and fusion ,nuclear reactor

  The energy released in the fusion of 2 kg of hydrogen deep in the sun is E(H) and the energy released in the fission of 2 kg of ²³⁵U is E(U). The ratio E(H)/E(U) is approximately :

  (Consider the fusion reaction as 4 ¹₁H + 2e⁻ → ⁴₂He + 2ν + 6γ + 26.7 MeV, energy released in the fission reaction of ²³⁵U is 200 MeV per fission nucleus and N(A) = 6.023 × 10²³)

  Options

  • Option A

    9.13

  • Option B

    15.04

  • Option C

    7.62

  • Option D

    25.6

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• NumericmediumRotational Motionrolling on inclined surface

  A circular disc reaches from top to bottom of an inclined plane of length ℓ. When it slips down the plane, it takes t s. When it rolls down the plane then it takes (α/2)¹ᐟ² t s, where α is ______.

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• MCQmediumProperties of solid and fluidviscosity and terminal velocity

  A spherical ball of radius 1 × 10⁻⁴ m and density 10⁵ kg/m³ falls freely under gravity through a distance h before entering a tank of water. If after entering in water the velocity of the ball does not change, then the value of h is approximately : (The coefficient of viscosity of water is 9.8 × 10⁻⁶ N s/m²)

  Options

  • Option A

    2296 m

  • Option B

    2249 m

  • Option C

    2518 m

  • Option D

    2396 m

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• MCQeasyProperties of solid and fluidproperties of fluid and surface tension

  The excess pressure inside a soap bubble is thrice the excess pressure inside a second soap bubble. The ratio between the volume of the first and the second bubble is :

  Options

  • Option A

    1 : 9

  • Option B

    1 : 3

  • Option C

    1 : 81

  • Option D

    1 : 27

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• MCQeasyAtomic Structure and X-raysatomic structure and bohr atomic model

  A hydrogen atom in ground state is given an energy of 10.2 eV. How many spectral lines will be emitted due to transition of electrons ?

  Options

  • Option A

    6

  • Option B

    3

  • Option C

    10

  • Option D

    1

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• NumericeasyWave OpticsYoung's Double Slit Experiment

  Monochromatic light of wavelength 500 nm is used in Young's double slit experiment. An interference pattern is obtained on a screen. When one of the slits is covered with a very thin glass plate (refractive index = 1.5), the central maximum is shifted to a position previously occupied by the 4th bright fringe. The thickness of the glass-plate is ______ μm.

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• NumericeasyCurrent electricityElectric Current, Drift Velocity & Resistance

  At room temperature (27ºC), the resistance of a heating element is 50 Ω. The temperature coefficient of the material is 2.4 × 10⁻⁴ ºC⁻¹. The temperature of the element, when its resistance is 62 Ω, is ______ ºC.

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• NumericeasyAC Circuitsseries combination of ac circuit and L-C-R circuit

  A capacitor of reactance 4√3 Ω and a resistor of resistance 4 Ω are connected in series with an ac source of peak value 8√2 V. The power dissipation in the circuit is ______ W.

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• NumericeasySimple Harmonic Motiontime period of linear shm

  A particle of mass 0.50 kg executes simple harmonic motion under force F = -50(N m⁻¹)x. The time period of oscillation is x/35 s. The value of x is ______. (Given π = 22/7)

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