JEE Mains 2024 04 Apr Morning Shift physics questions with solutions

Showing 1–10 of 30 questions

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

  A hydrogen atom changes its state from n = 3 to n = 2. Due to recoil, the percentage change in the wave length of emitted light is approximately 1 × 10⁻ⁿ. The value of n is ________. [Given Rhc = 13.6 eV, hc = 1242 eV nm, h = 6.6 × 10⁻³⁴ J s, mass of the hydrogen atom = 1.6 × 10⁻²⁷ kg]

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• MCQeasyGeometrical opticslens and combination lens,silvered lens

  An effective power of a combination of 5 identical convex lenses which are kept in contact along the principal axis is 25 D. Focal length of each of the convex lens is:

  Options

  • Option A

    20 cm

  • Option B

    50 cm

  • Option C

    500 cm

  • Option D

    25 cm

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• MCQeasyCurrent electricityElectric Current, Drift Velocity & Resistance

  The resistances of the platinum wire of a platinum resistance thermometer at the ice point and steam point are 8 Ω and 10 Ω respectively. After inserting in a hot bath of temperature 400°C, the resistance of platinum wire is:

  Options

  • Option A

    2 Ω

  • Option B

    16 Ω

  • Option C

    8 Ω

  • Option D

    10 Ω

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• NumericmediumMathematical tools and vectorVector

  Two forces $\vec{F}_1$ and $\vec{F}_2$ are acting on a body. One force has magnitude thrice that of the other force and the resultant of the two forces is equal to the force of larger magnitude. The angle between F₁ and F₂ is cos⁻¹(1/n). The value of |n| is ____.

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• MCQmediumsemiconductorapplication of diode and zener breakdown

  The value of net resistance of the network as shown in the given figure is:

  

  Options

  • Option A

    5/2 Ω

  • Option B

    15/4 Ω

  • Option C

    6 Ω

  • Option D

    30/11 Ω

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• MCQeasyNuclear physicsnuclear fission and fusion ,nuclear reactor

  Which of the following nuclear fragments corresponding to nuclear fission between neutron (¹₀n) and uranium isotope (²³⁵₉₂U) is correct:

  Options

  • Option A

    ¹⁴⁴₅₆Ba + ⁸⁹₃₆Kr + 4 ¹₀n

  • Option B

    ¹⁴⁰₅₆Xe + ⁹⁴₃₈Sr + 3 ¹₀n

  • Option C

    ¹⁵³₅₁Sb + ⁹⁹₄₁Nb + 3 ¹₀n

  • Option D

    ¹⁴⁴₅₆Ba + ⁸⁹₃₆Kr + 3 ¹₀n

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• NumericmediumAC Circuitsavg value and rms value of ac

  An alternating current at any instant is given by i = [6 + √56 sin(100πt + π/3)] A. The rms value of the current is ______ A.

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• MCQmediumKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  The co-ordinates of a particle moving in x-y plane are given by:

  x = 2 + 4t, y = 3t + 8t².

  The motion of the particle is:

  Options

  • Option A

    non-uniformly accelerated.

  • Option B

    uniformly accelerated having motion along a straight line.

  • Option C

    uniform motion along a straight line.

  • Option D

    uniformly accelerated having motion along a parabolic path.

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• NumericmediumCurrent electricityCircuit Theory & Kirchhoff’s Laws

  Twelve wires each having resistance 2 Ω are joined to form a cube. A battery of 6 V emf is joined across point a and c. The voltage difference between e and f is ______ V.

  

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• MCQmediumUnit dimension and errorDimension and its application

  The equation of stationary wave is:

  y = 2a sin(2πnt/λ) cos(2πx/λ)

  Which of the following is NOT correct:

  Options

  • Option A

    The dimensions of nt is [L]

  • Option B

    The dimensions of n is [LT⁻¹]

  • Option C

    The dimensions of n/λ is [T]

  • Option D

    The dimensions of x is [L]

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