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Day 435: JEE Mains Physics

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

  1. Question 1

    Ray Optics. Asked once: 5 Apr 2026 S1

    17
    A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two identical plano-convex lenses. One of them is used in place of original objective lens. To retain same magnification keeping the object distance unchanged, the tube length has to be :-

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  2. Question 2

    Semiconductor Electronics. Asked once: 8 Apr 2026 S2

    20
    The output Y for the given inputs A and B to the circuit is :

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  3. Question 3

    System of Particles and Rotational Motion. Asked once: 8 Apr 2026 S2

    7
    A solid cylinder having radius R and length L is slipping on a rough horizontal plane. At time t=0t = 0 the cylinder has a translational velocity v0=49 m/sv_{0}= 49\text{ }m/s, perpendicular to its axis and a rotational velocity v0/4Rv_{0}/4R about the centre. The time taken by the cylinder to start rolling is ____\_\_\_\_ seconds. (coefficient of kinetic friction μK=0.25\mu_{K}= 0.25 and g=9.8 m/s2g = 9.8\text{ }m/s^{2} )

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  4. Question 4

    Thermal Properties of Matter. Asked once: 5 Apr 2026 S2

    22
    The heat extracted out of x gram of water initially at 50∘C50^{\circ}C to cool it down to 0∘C0^{\circ}C is sufficient to evaporate (1000−x1000 - x) gram of water also initially at 50∘C50^{\circ}C. The value of x (closest integer) is ____\_\_\_\_ . (Take latent heat of water 2256 kJ/kg2256\text{ }kJ/kg, specific heat capacity of water 4200 J/kg K4200\text{ }J/kg\ K)

  5. Question 5

    Thermodynamics. Asked once: 6 Apr 2026 S2

    5
    A cylinder with adiabatic walls is closed at both ends and is divided into two compartments by a frictionless adiabatic piston. Ideal gas is filled in both (left and right) the compartments at same P,VP,V, T. Heating is started from left side until pressure changes to 27P8\frac{27P}{8}. If initial volume of each compartment was 9 litres then the final volume in right-hand side compartment is ____\_\_\_\_ litres. (for this ideal gas CP/Cv=1.5C_{P}/C_{v}= 1.5 )

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