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Day 58: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Thermodynamics. This type asked 3 times: 6 Apr 2024, 23 Jan 2026 S2, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 3 of this type

    10
    One mole of diatomic gas having rotational modes only is kept in a cylinder with a piston system. The cross-section area of the cylinder is 0.4 cm20.4{\text{ }cm}^{2}. The gas is heated slowly to raise the temperature by 1.2 ∘C1.2\ ^{\circ}C during which the piston moves by 25 mm . The amount of heat supplied to the gas is ____\_\_\_\_ J. (Atmospheric pressure =100kPa= 100kPa, R=8.3 J/mol.KR = 8.3\text{ }J/mol.K ) (Neglect mass of the piston)

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  2. Question 2

    Electromagnetic Induction. This type asked 3 times: 10 Apr 2023, 23 Jan 2026 S2, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 3 of this type

    14
    A square loop of side 2 cm is placed in a time varying magnetic field with magnitude as B=0.4sin⁡(300t)B = 0.4\sin(300t) Tesla. The normal to the plane of loop makes an angle of 60∘60^{\circ} with the field. The maximum induced emf produced in the loop is ____\_\_\_\_ mV .

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  3. Question 3

    Mechanical Properties of Solids. This type asked 3 times: 27 Jul 2022, 25 Jan 2023, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 3 of this type

    8
    Figure represents the extension ( Δl\Delta l ) of a wire of length 1 meter, suspended from the ceiling of the room at one end with load W connected to the other end. If the cross- sectional area of the wire is 10−5 m210^{- 5}{\text{ }m}^{2} then the Young's modulus of the wire is ____\_\_\_\_ N/m2N/m^{2}.

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  4. Question 4

    Ray Optics. This type asked 3 times: 29 Jan 2024, 4 Apr 2025, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 3 of this type

    25
    A concave mirror of focal length 10 cm forms an image which is double the size of object when the object is placed at two different positions. The distance between the two positions of the object is ____\_\_\_\_ cm.

  5. Question 5

    Electrostatics. This type asked 3 times: 2021 Paper 21, 4 Apr 2025, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 3 of this type

    13
    A thin half ring of radius 35 cm is uniformly charged with a total charge of Q coulomb. If the magnitude of the electric field at center of the half ring is 100 V/m100\text{ }V/m, then the value of Q is ____\_\_\_\_ nC. ( ϵ0=8.85×10−12C2/Nm2\epsilon_{0}= 8.85 \times10^{- 12}C^{2}/Nm^{2} and π=3.14\pi= 3.14 )

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