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Day 228: JEE Mains Physics

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

  1. Question 1

    System of Particles and Rotational Motion. Asked once: 2 Apr 2025 (same type asked 2 times) See all 2 of this type

    16
    Moment of inertia of a rod of mass ' M ' and length 'L' about an axis passing through its center and normal to its length is ' α\alpha '. Now the rod is cut into two equal parts and these parts are joined symmetrically to form a cross shape. Moment of inertia of cross about an axis passing through its center and normal to plane containing cross is :

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  2. Question 2

    Laws of Motion. Asked once: 29 Jan 2023 (same type asked 2 times) See all 2 of this type

    6
    A block of mass mm slides down the plane inclined at angle 30∘30^{\circ} with an acceleration g4\frac{g}{4}. The value of coefficient of kinetic friction will be:

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  3. Question 3

    Thermal Properties of Matter. Asked once: 22 Jan 2025 (same type asked 2 times) See all 2 of this type

    5
    Two spherical bodies of same materials having radii 0.2 m and 0.8 m are placed in same atmosphere. The temperature of the smaller body is 800 K and temperature of bigger body is 400 K . If the energy radiate from the smaller body is E , the energy radiated from the bigger body is (assume, effect of the surrounding to be negligible)

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  4. Question 4

    Alternating Current. Asked once: 3 Apr 2025 (same type asked 2 times) See all 2 of this type

    90
    An electric bulb rated as 100 W−220 V100\text{ }W - 220\text{ }V is connected to an ac source of rms voltage 220 V . The peak value of current through the bulb is :

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  5. Question 5

    Laws of Motion. Asked once: 2 Apr 2025 (same type asked 2 times) See all 2 of this type

    91
    A body of mass 1 kg is suspended with the help of two strings making angles as shown in figure. Magnitude of tensions T1T_{1} and T2T_{2}, respectively, are (in N ) :

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