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Day 388: MHT-CET Physics

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

  1. Question 1

    Semiconductor Devices. Asked once: 20 Apr 2025 S1

    14
    For an ideal diode, in forward and reverse biased condition the resistance is respectively

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  2. Question 2

    Sound. Asked once: 10 May 2023 S2

    29
    Prong of a vibrating tuning fork is in contact with water surface. It produces concentric circular waves on the surface of water. The distance between five consecutive crests is 0.8 m and the velocity of wave on the water surface is 56 m/s. The frequency of tuning fork is

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  3. Question 3

    Structure of Atoms and Nuclei. Asked once: 9 May 2024 S2

    49
    The wavelength of light for the least energetic photons emitted in the Lyman series of the hydrogen spectrum is nearly [Take hc=1240hc = 1240 eV·nm, change in energy of the levels =10.2= 10.2 eV]

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  4. Question 4

    Superposition of Waves. Asked once: 9 May 2024 S2

    8
    If the length of an open organ pipe is 33.3 cm, then the frequency of fifth overtone is [Neglect end correction, velocity of sound =333= 333 m/s]

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  5. Question 5

    Thermal Properties of Matter. Asked once: 22 Apr 2025 S2

    27
    The two ends of a rod of length ' xx ' and uniform cross-sectional area ' A ' are kept at temperatures ' T1T_{1} ' and ' T2T_{2} ' respectively ( T1>T2T_{1}>T_{2} ). If the rate of heat transfer is ' Q/tQ/t ', through the rod in steady state, then the coefficient of thermal conductivity ' K ' is

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