JEE Mains 2025 4 April Evening Shift physics questions with solutions

Showing 1–10 of 25 questions

• MCQmediumsemiconductorP-N jucntion and diode in reverse and forward bias

  Consider an n-type semiconductor in which nₑ and nₕ denote electron and hole concentrations respectively. Statements: A) holes are minority carriers; B) the dopant is a pentavalent atom; C) nₑnₕ ≠ nᵢ²; D) nₑnₕ ≥ nᵢ²; E) holes are not generated by the donor atoms. Choose the correct set.

  Options

  • Option A

    A, C and D only

  • Option B

    A, B and E only

  • Option C

    A, C and E only

  • Option D

    A, B and C only

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• IntegermediumElectromagnetic wavedisplacement current and properties of electromagnetic wave

  An optical medium has relative permeability μᵣ = 10/π and relative permittivity εᵣ = 1/0.0885. The speed of light in vacuum is greater than the speed in this medium by how many times?

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• MCQeasyCurrent electricitycombination of cells and maximum power theorem

  There are n identical electric bulbs. Each bulb is designed to draw power P when connected independently across the mains voltage. The n bulbs are now connected in series across the same mains supply. The total power drawn is:

  Options

  • Option A

    P/n²

  • Option B

    P/n

  • Option C

    P

  • Option D

    nP

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

  An inductor of self-inductance 1 H is connected in series with a resistor of 100π Ω across an AC supply of 100π V (rms) and frequency 50 Hz. Find the maximum current in ampere.

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• NumericmediumWave Opticsyoung's dubble slit experiments

  In a Young's double-slit experiment, the slit separation is 1.5 mm. Twenty interference maxima are contained within the central maximum of the single-slit diffraction envelope. If the width of each slit is x×10⁻³ cm, find x.

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• MCQeasyWave Opticspolarisation

  Two polarisers P₁ and P₂ are arranged so that no light is transmitted through them. A third polariser P₃ is inserted between P₁ and P₂. For maximum transmitted intensity through the three polarisers, the angle between P₂ and P₃ is:

  Options

  • Option A

    π/3

  • Option B

    π/8

  • Option C

    π/4

  • Option D

    π/6

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• MCQmediumWork , Power and Energyquestion based on work

  A block of mass 25 kg is pulled along a horizontal rough surface by a force F making 45° with the horizontal. The coefficient of friction is 0.25. The block moves with uniform velocity. The work done by the applied force over a horizontal displacement of 5 m is:

  Options

  • Option A

    970 J

  • Option B

    245 J

  • Option C

    735 J

  • Option D

    490 J

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• MCQmediumThermodyanmicsthermal expansion solid and liquid

  A rectangular sheet has length 9 cm, width 4 cm, coefficient of linear expansion α = 3.1×10⁻⁵ K⁻¹, mass 0.1 kg and specific heat capacity 900 J kg⁻¹ K⁻¹. If 8.1×10² J of heat is supplied, the increase in its area is:

  Options

  • Option A

    3.0×10⁻⁷ m²

  • Option B

    2.0×10⁻⁶ m²

  • Option C

    4.0×10⁻⁷ m²

  • Option D

    6.0×10⁻⁷ m²

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• MCQeasyGravitationacceleration due to gravity and escape velocity

  An object is initially at rest at a height 3R above the Earth's surface, where R is Earth's radius. The minimum speed with which it must be projected so that it does not return to Earth is:

  Options

  • Option A

    √(GM/(2R))

  • Option B

    √(GM/R)

  • Option C

    √(3GM/R)

  • Option D

    √(2GM/R)

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• MCQmediumRotational Motioncombined translatory and rotatory motion ,Pure rolling motion

  A wheel rolls without slipping on a horizontal surface. The speed of the particle at the highest point of the rim is 8 m/s. The speed of a particle on the rim that is at the same level as the centre of the wheel is:

  Options

  • Option A

    8√2 m/s

  • Option B

    8 m/s

  • Option C

    4√2 m/s

  • Option D

    4 m/s

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