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Day 223: MHT-CET Physics

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

  1. Question 1

    Superposition of Waves. Asked once: 14 May 2024 S1 (same type asked 5 times) See all 5 of this type

    32
    A string is stretched between two rigid supports separated by 75 cm. There are no resonant frequencies between 420 Hz and 315 Hz. The lowest resonant frequency for the string is

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  2. Question 2

    Kinetic Theory of Gases. Asked once: 26 Apr 2025 S1 (same type asked 5 times) See all 5 of this type

    18
    The temperature at which oxygen molecules will have same r.m.s. speed as helium molecules at 57∘C57^{\circ}C is (molecular masses of oxygen and helium are 32 and 4 respectively.)

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  3. Question 3

    Laws of Motion. Asked once: 13 Apr 2026 S2 (same type asked 5 times) See all 5 of this type

    105
    100100 balls each of mass mm moving with speed vv simultaneously strike a wall normally and reflected back with same speed, in time tt s. The total magnitude of force exerted by the balls on the wall is

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  4. Question 4

    Structure of Atoms and Nuclei. Asked once: May 2022 S1 (same type asked 5 times) See all 5 of this type

    28
    The wave number of the last line of the Balmer series in hydrogen spectrum will be (Rydberg's constant = 10710^7 m−1^{-1})

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  5. Question 5

    Sound. Asked once: 4 May 2023 S2 (same type asked 5 times) See all 5 of this type

    43
    A train sounding a whistle of frequency 510 Hz approaches a station at 72 km/hr. The frequency of the note heard by an observer on the platform as the train (1) approaches the station and then (2) recedes the station are respectively (in hertz) (velocity of sound in air = 320 m/s)

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