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Day 88: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. Asked 2 times: 24 Jan 2023*, 24 Jan 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    24
    A uniform solid cylinder of length LL and radius RR has moment of inertia about its axis equal to I1I_{1}. A small co-centric cylinder of length L/2L/2 and radius R/3R/3 carved from this cylinder has moment of inertia about its axis equals to I2I_{2}. The ratio I1/I2I_{1}/I_{2} is ____\_\_\_\_ .

  2. Question 2

    Work, Energy and Power. Asked 2 times: 29 Jun 2022*, 23 Jan 2026 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    2
    A body of mass 14 kg initially at rest explodes and breaks into three fragments of masses in the ratio 2:2:32:2:3. The two pieces of equal masses fly off perpendicular to each other with a speed of 18 m/s18\text{ }m/s each. The velocity of the heavier fragment is ____\_\_\_\_ m/sm/s.

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  3. Question 3

    Dual Nature of Radiation and Matter. Asked 2 times: 29 Jun 2022*, 21 Jan 2026 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    12
    A light wave described by E=60[sin⁡(3×1015t)+sin⁡(12×1015t)]E = 60\left[\sin\left(3 \times 10^{15}t\right) + \sin\left(12 \times 10^{15}t\right)\right] (in SI units) falls on a metal surface of work function 2.8 eV . The maximum kinetic energy of ejected photoelectron is (approximately) ____\_\_\_\_ eV. (h=6.6×10−34 J sh = 6.6 \times 10^{-34}\ J\,s and e=1.6×10−19 Ce = 1.6 \times 10^{-19}\ C)

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  4. Question 4

    Electromagnetic Induction. Asked 2 times: 10 Apr 2023*, 21 Jan 2026 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    16
    A 1 m long metal rod AB completes the circuit as shown in figure. The area of circuit is perpendicular to the magnetic field of 0.10 T. If the resistance of the total circuit is 2Ω2\Omega then the force needed to move the rod towards right with constant speed (v) of 1.5 m/s1.5\text{ }m/s is ____\_\_\_\_ N.

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  5. Question 5

    Thermal Properties of Matter. Asked 2 times: 26 Jun 2022*, 21 Jan 2026 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    2
    A gas based geyser heats water flowing at the rate of 5.0 litres per minute from 27∘C27^{\circ}C to 87∘C87^{\circ}C. The rate of consumption of the gas is ____\_\_\_\_ g/s. (Take heat of combustion of gas =5.0×104 J/g= 5.0 \times10^{4}\text{ }J/g ) specific heat capacity of water =4200 J/kg⋅ ∘C= 4200\text{ }J/kg \cdot\ ^{\circ}C

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