JEE Mains 2024 09 Apr Morning Shift physics questions with solutions

Showing 1–10 of 30 questions

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

  The energy equivalent of 1 g of substance is:

  Options

  • Option A

    11.2 × 10²⁴ MeV

  • Option B

    5.6 × 10¹² MeV

  • Option C

    5.6 eV

  • Option D

    5.6 × 10²⁶ MeV

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• MCQeasyAc Cirucuitsseries combination of ac circuit and L-C-R circuit

  A bulb and a capacitor are connected in series across an ac supply. A dielectric is then placed between the plates of the capacitor. The glow of the bulb:

  Options

  • Option A

    increases

  • Option B

    remains same

  • Option C

    becomes zero

  • Option D

    decreases

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• NumericmediumNuclear physicsnuclear fission and fusion ,nuclear reactor

  A star has 100% helium composition. It starts to convert three ⁴He into one ¹²C via triple alpha process as

  ⁴He + ⁴He + ⁴He → ¹²C + Q.

  The mass of the star is 2.0 × 10³² kg and it generates energy at the rate of 5.808 × 10³⁰ W. The rate of converting these ⁴He to ¹²C is n × 10⁴² s⁻¹, where n is _______.

  [Take, mass of ⁴He = 4.0026 u, mass of ¹²C = 12 u]

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• NumericmediumCurrent electricitycircuit theory

  The current flowing through the 1 Ω resistor is n/10 A. The value of n is ________.

  

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• NumericmediumMathematical tools and vector

  If vector a and vector b make an angle cos⁻¹(5/9) with each other, then |a + b| = √2 |a - b| for |a| = n|b|. The integer value of n is _______.

  Your answer

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• MCQmediumCurrent electricityelectric instruments

  A galvanmeter has a coil of resistance 200 Ω with a full scale deflection at 20 μA. The value of resistance to be added to use it as an ammeter of range (0–20) mA is:

  Options

  • Option A

    0.40 Ω

  • Option B

    0.20 Ω

  • Option C

    0.50 Ω

  • Option D

    0.10 Ω

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• MCQmediumFluid Mechanicspascal law and buoyant force

  A sphere of relative density σ and diameter D has concentric cavity of diameter d. The ratio of D/d, if it just floats on water in a tank is:

  Options

  • Option A

    [σ/(σ - 1)]¹ᐟ³

  • Option B

    1 + [σ/(σ - 1)]¹ᐟ³

  • Option C

    [(σ - 1)/σ]¹ᐟ³

  • Option D

    [(σ - 2)/(σ + 2)]¹ᐟ³

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• NumericmediumWave OpticsYoung's Double Slit Experiment

  In a Young's double slit experiment, the intensity at a point is 1/4th of the maximum intensity, the minimum distance of the point from the central maximum is ________ μm. (Given: λ = 600 nm, d = 1.0 mm, D = 1.0 m)

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• MCQmediumThermodyanmicsthermodynmic process and work done

  The volume of an ideal gas (γ = 1.5) is changed adiabatically from 5 litres to 4 litres. The ratio of initial pressure to final pressure is:

  Options

  • Option A

    4/5

  • Option B

    16/25

  • Option C

    8/(5√5)

  • Option D

    2/5

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• MCQeasyUnit dimension and errorvernier callipers and screw gauge

  One main scale division of a vernier caliper is equal to m units. If nth division of main scale coincides with (n + 1)th division of vernier scale, the least count of the vernier caliper is:

  Options

  • Option A

    n/(n + 1)

  • Option B

    m/(n + 1)

  • Option C

    1/(n + 1)

  • Option D

    m/[n(n + 1)]

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