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Day 333: MHT-CET Physics

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

  1. Question 1

    Semiconductor Devices. Asked once: 19 May 2026 S1

    150
    The band diagrams of three semiconductors p, n and intrinsic are given in the figures (1), (2) and (3). C and V are the conduction and valence bands and EFE_F is the Fermi level. Figures, from (2),(1) and (3) respectively represent the type of semiconductors as

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  2. Question 2

    Sound. Asked once: 19 May 2026 S1

    124
    The amplitude of a sound wave at a distance rr from a point source is AA. The amplitude at a distance 2r2r from the point source is

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  3. Question 3

    Structure of Atoms and Nuclei. Asked once: 19 May 2026 S2

    147
    A radioactive nucleus X with a half-life TT, decays into a nucleus Y. At t=0t = 0, there is no nucleus Y. After some time 'tt', the ratio of the number of Y to that of X is 0.40.4. Then, 'tt' is

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  4. Question 4

    Superposition of Waves. Asked once: 14 May 2026 S1

    123
    n1n_1 is the fundamental frequency of the pipe closed at one end and n2n_2 is the fundamental frequency of the pipe open at both ends. If both are joined end to end, the fundamental frequency of closed pipe so formed is

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  5. Question 5

    Thermal Properties of Matter. Asked once: 19 May 2026 S1

    114
    The length of mercury column in a mercury-in-glass thermometer is H1H_1 mm at the ice point and H2H_2 mm at the steam point. When the length is HH mm, the temperature TT is given in ∘^\circC by (H1<H2)(H_1 < H_2)

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