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Day 463: JEE Mains Physics

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

  1. Question 1

    Units and Measurements. Asked once: 21 Jan 2026 S1

    5
    In an experiment the values of two spring constants were measured as k1=(10±0.2)N/mk_{1}= (10 \pm 0.2)N/m and k2=(20±0.3)N/mk_{2}= (20 \pm 0.3)N/m. If these springs are connected in parallel, then the percentage error in equivalent spring constant is :

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  2. Question 2

    Wave Optics. Asked once: 5 Apr 2024

    1
    Light emerges out of a convex lens when a source of light kept at its focus. The shape of wave front of the light is:

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  3. Question 3

    Waves. Asked once: 1 Feb 2024

    27
    A tuning fork resonates with a sonometer wire of length 1 m1\text{ }m stretched with a tension of 6 N6\text{ }N. When the tension in the wire is changed to 54 N54\text{ }N, the same tuning fork produces 12 beats per second with it. The frequency of the tuning fork is ____ HzHz

  4. Question 4

    Work, Energy and Power. Asked once: 21 Jan 2026 S1

    1
    Potential energy (VV) versus distance (xx) is given by the graph, Rank various regions as per the magnitudes of the force (F) acting on a particle from high to low.

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  5. Question 5

    Alternating Current. Asked once: 5 Apr 2024

    28
    An ac source is connected in given series LCR circuit. The rms potential difference across the capacitor of 20μF20\mu F is........... VV.