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Day 347: MHT-CET Physics

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

  1. Question 1

    Sound. Asked once: 13 Apr 2026 S2

    123
    Sound waves travel at 350350 m/s through a warm air and at 35003500 m/s through brass. Which of the following is correct about the wavelength of a 700700 Hz accoustic wave as it enters brass from warm air?

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  2. Question 2

    Structure of Atoms and Nuclei. Asked once: 12 May 2026 S2

    146
    In Bohr's theory of hydrogen atom, in any series of spectral lines, wavelength of first line and corresponding series limit is respectively

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  3. Question 3

    Superposition of Waves. Asked once: 18 Apr 2026 S2

    121
    In an organ pipe closed at one end produces a fundamental note of frequency 'ν\nu'. The pipe is cut into two pipes of equal length. The fundamental frequencies produced in the two pipes are

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  4. Question 4

    Thermal Properties of Matter. Asked once: 14 May 2026 S2

    111
    A metal rod (A) of length 2020 cm expands by 0.0750.075 cm when its temperature changes from 0∘C0^\circ\mathrm{C} to 100∘C100^\circ\mathrm{C}. Another metal rod (B) of different metal of same length expands by 0.0450.045 cm for same temperature change. A third rod of same length is composed of 2 parts, one of metal A and another of metal B. For same temperature change, this rod expands by 0.0600.060 cm. The portion made of metal A has the length

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  5. Question 5

    Thermodynamics. Asked once: 15 May 2026 S1

    114
    One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown. The change in internal energy of the gas during the transition is

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