13 April 2023 physics questions with solutions

Showing 1–10 of 28 questions

• MCQmediumElectrostaticElectric Dipole & Dipole Moment

  Two charges each of magnitude 0.01 C separated by 0.4 mm form a dipole. It is placed in a uniform electric field of 10 dyne C⁻¹ at 30°. The torque magnitude is:

  Options

  • Option A

    1.5 × 10⁻⁹ N m

  • Option B

    2.0 × 10⁻¹⁰ N m

  • Option C

    1.0 × 10⁻⁸ N m

  • Option D

    4.0 × 10⁻¹⁰ N m

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  JEE Mains13 April 2023Shift 1Morning Shift

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• MCQmediumRotational MotionCombined Translational & Rotational Motion

  A disc of radius R rolls without slipping. At t=0 the topmost material point is A. After the disc completes half a rotation, the displacement of A from its initial position is:

  

  Options

  • Option A

    2R√(1+4π²)

  • Option B

    R√(π²+4)

  • Option C

    2R

  • Option D

    R√(π²+1)

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• MCQmediumsemiconductorLogic Gates & Boolean Operations

  For the logic circuit and input waveforms A and B shown, choose the correct output waveform Y.

  

  Options

  • Option A

    
  • Option B

    
  • Option C

    
  • Option D

    

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• MCQeasyWork , Power and EnergyKinetic Energy & Work-Energy Theorem

  Two bodies have kinetic energies in the ratio 16:9 and the same linear momentum. Their masses are in the ratio:

  Options

  • Option A

    16 : 9

  • Option B

    4 : 3

  • Option C

    9 : 16

  • Option D

    3 : 4

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• IntegermediumProperties of solid and fluidElastic Properties of Solids: Stress, Strain and Elastic Moduli

  A steel wire of length 20 m stores 80 J elastic energy when stretched by 2 cm. If Y = 2.0 × 10¹¹ N m⁻², find its cross-sectional area in mm².

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• MCQeasyGravitationAcceleration Due to Gravity & Escape Velocity

  A planet has mass 9Mₑ and radius 4Rₑ. If Earth's escape speed is vₑ = 11.2 km s⁻¹, the planet's escape speed is:

  Options

  • Option A

    11.2 km s⁻¹

  • Option B

    67.2 km s⁻¹

  • Option C

    33.6 km s⁻¹

  • Option D

    16.8 km s⁻¹

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• MCQeasyThermodynamicsThermodynamic Processes, P-V Diagrams and Work Done

  Under isothermal conditions, pressure varies as P = aV⁻³. The bulk modulus is:

  Options

  • Option A

    P/2

  • Option B

    2P

  • Option C

    P

  • Option D

    3P

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• MCQmediumFluid MechanicsEquation of Continuity and Bernoulli's Principle

  A liquid of density 1000 kg m⁻³ flows steadily through a horizontal tube. Area at A is 1.5 cm², area at B is 25 mm², and speed at B is 60 cm s⁻¹. The pressure difference Pₐ - Pʙ is:

  

  Options

  • Option A

    175 Pa

  • Option B

    36 Pa

  • Option C

    27 Pa

  • Option D

    135 Pa

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• MCQeasyPhotoelectric effect and dual naturePhotoelectric Effect & Einstein's Equation

  Two metals A and B have work functions 9 eV and 4.5 eV. Given hc = 1242 eV nm, the difference between their threshold wavelengths is:

  Options

  • Option A

    276 nm

  • Option B

    264 nm

  • Option C

    540 nm

  • Option D

    138 nm

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• IntegermediumRotational MotionCombined Translational & Rotational Motion

  A solid sphere rolls without slipping. The ratio of its angular momentum about its rotation axis to its total kinetic energy is π:22. Find its angular speed in rad s⁻¹.

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