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Day 41: MHT-CET Physics

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

  1. Question 1

    Current Electricity. This type asked 5 times: 4 May 2023 S1, 9 May 2023 S1, 11 Apr 2026 S1, 19 Apr 2026 S1, 13 May 2026 S1. This one: 13 May 2026 S1 See all 5 of this type

    129
    The resistances in two arms of the metre bridge are 5 Ω5\,\Omega and R ΩR\,\Omega respectively, null point is obtained at length l1l_1. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6l11.6l_1. The resistance R is

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  2. Question 2

    Electrostatics. This type asked 5 times: 10 May 2023 S2, 15 May 2023 S2, 25 Apr 2025 S1, 20 Apr 2026 S1, 13 May 2026 S1. This one: 13 May 2026 S1 See all 5 of this type

    127
    Two point charges, +2C+2C and +6C+6C repel each other with a force of 1212N. If a charge of (−4C)(-4C) is given to each of these charges, the force now is

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  3. Question 3

    Magnetic Fields Due to Electric Current. This type asked 5 times: 10 May 2023 S1, 16 May 2023 S2, 11 May 2024 S2, 20 Apr 2026 S2, 13 May 2026 S1. This one: 16 May 2023 S2 See all 5 of this type

    49
    A current II flows in anticlockwise direction in a circular arc of a wire having 34\frac{3}{4}th of circumference of a circle of radius RR. The magnetic field BB at the centre of circle is (μ0=\mu_0 = permeability of free space)

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  4. Question 4

    Mechanical Properties of Fluids. This type asked 5 times: 15 May 2023 S1, 10 May 2024 S1, 11 May 2024 S1, 21 Apr 2025 S2, 12 May 2026 S2. This one: 15 May 2023 S1 See all 5 of this type

    12
    The angle of contact between glass and water is 0∘0^{\circ} and water rises in a glass capillary upto 6 cm (Surface tension of water is T). Another liquid of surface tension '2T', angle of contact 60∘60^{\circ} and relative density 2 will rise in the same capillary up to (cos⁡0∘=1,cos⁡60∘=0.5\cos 0^{\circ}=1, \cos 60^{\circ}=0.5)

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  5. Question 5

    Rotational Dynamics. This type asked 5 times: May 2021 S1, 11 May 2024 S1, 21 Apr 2025 S1, 13 Apr 2026 S1, 12 May 2026 S2. This one: 12 May 2026 S2 See all 5 of this type

    105
    A disc of mass 100100 kg and radius 11m is rotating at 300300 r.p.m. The torque required to rotate the disc in opposite direction with same speed in time 5050 second is

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