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Day 283: MHT-CET Physics

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

  1. Question 1

    Superposition of Waves. Asked once: 3 May 2023 S1 (same type asked 5 times) See all 5 of this type

    39
    The displacement of a wave is given by y=0.002sin⁡(100t+x)y=0.002\sin(100t+x) where 'x' and 'y' are in metre and 't' is in second. This represents a wave

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  2. Question 2

    AC Circuits. Asked once: 3 May 2023 S2 (same type asked 5 times) See all 5 of this type

    16
    A transformer is used to set up an alternating e.m.f. of 220 V to 4.4 kV to transmit 6.6 kW of power. The primary coil has 1000 turns. The current rating of the secondary coil is (Transformer is ideal)

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  3. Question 3

    Electrostatics. Asked once: 4 May 2023 S1 (same type asked 5 times) See all 5 of this type

    2
    A parallel plate air capacitor, with plate separation dd has a capacitance of 9 pF. The space between the plates is now filled with two dielectrics, the first having K1=3K_1 = 3 and thickness d1=d/3d_1 = d/3, while the 2nd has K2=6K_2 = 6 and thickness d2=2d/3d_2 = 2d/3. The capacitance of the new capacitor is

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  4. Question 4

    Oscillations. Asked once: 15 May 2023 S1 (same type asked 5 times) See all 5 of this type

    46
    The maximum velocity of a particle, executing S.H.M. with an amplitude 7 mm is 4.44.4 ms−1^{-1}. The period of oscillation is π=227\pi = \frac{22}{7}

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  5. Question 5

    Electromagnetic Induction. Asked once: 9 May 2024 S1 (same type asked 5 times) See all 5 of this type

    8
    The magnetic flux through a loop of resistance 10 Ω10\,\Omega is varying according to the relation ϕ=6t2+7t+1\phi=6t^2+7t+1, where ϕ\phi is in milliweber, time is in second. Then at time t=1t=1 s the induced e.m.f. is

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