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Day 372: MHT-CET Physics

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

  1. Question 1

    Rotational Dynamics. Asked once: 17 Apr 2026 S2

    107
    A mass tied to a string is whirled in a horizontal circular path with a constant angular velocity and its angular momentum is 'L'. If the length of the string is now halved, keeping angular velocity same then the angular momentum will be

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  2. Question 2

    Semiconductor Devices. Asked once: 15 Apr 2026 S1

    149
    For a p-n junction diode, breakdown voltage occurs when

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  3. Question 3

    Sound. Asked once: 11 May 2024 S2

    15
    A sound of frequency 480 Hz is emitted from the stringed instrument. The velocity of sound in air is 320 m/s. After completing 180 vibrations, the distance covered by a wave is

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  4. Question 4

    Structure of Atoms and Nuclei. Asked once: 20 Apr 2025 S2

    25
    The apparent wavelength of light from a star moving away from the earth is 0.02%0.02\% more than the actual wavelength. The velocity of star is [ c=c= velocity of light =3×108 m/s= 3 \times10^{8}\text{ }m/s ]

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  5. Question 5

    Superposition of Waves. Asked once: 14 May 2024 S2

    12
    Sound waves of frequency 600 Hz fall normally on a perfectly reflecting wall. The shortest distance from the wall at which all particles will have maximum amplitude of vibration is (speed of sound =300 ms−1= 300\,\text{ms}^{-1})

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