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Day 173: MHT-CET Physics

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

  1. Question 1

    Superposition of Waves. Asked 2 times: 2 May 2023 S2*, 15 May 2023 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    4
    The driver of a car travelling with a speed V1V_{1} m/s towards a wall sounds a siren of frequency nn Hz. If the velocity of sound in air is VV m/s, then the frequency of sound reflected from the wall and as heard by the driver, in Hz, is

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  2. Question 2

    Electrostatics. Asked 2 times: May 2021 S1, 11 May 2023 S2 See all 2 times it was asked

    6
    A particle 'A' has charge '+q' and a particle 'B' has charge '+4q'. Each has same mass 'm'. When they are allowed to fall from rest through the same potential, the ratio of their speeds will become (particle A to particle B)

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  3. Question 3

    Magnetic Fields Due to Electric Current. Asked 2 times: 9 May 2023 S2, 11 May 2023 S2 See all 2 times it was asked

    22
    A current carrying circular loop of radius 'R' and current carrying long straight wire are placed in the same plane. The current through circular loop and long straight wire are 'ICI_C' and 'IwI_w' respectively. The perpendicular distance between centre of the circular loop and wire is 'd'. The magnetic field at the centre of the loop will be zero when separation 'd' is equal to

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  4. Question 4

    Sound. Asked 2 times: 9 May 2023 S1*, 11 May 2023 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    27
    A resonance tube closed at one end is of height 1.5 m. A tuning fork of frequency 340 Hz is vibrating above the tube. Water is poured in the tube gradually. The minimum height of water column for which resonance is obtained is (Neglect end correction, speed of sound in air = 340 m/s)

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  5. Question 5

    Thermal Properties of Matter. Asked 2 times: 2 May 2023 S1*, 11 May 2023 S1 (* = numbers or wording changed that year) See all 2 times it was asked

    42
    Rails of material of steel are laid with gaps to allow for thermal expansion. Each track is 10 m long, when laid at temperature 17∘17^\circC. The maximum temperature that can be reached is 45∘45^\circC. The gap to be kept between the two segments of railway track is αsteel=1.3×10−5/∘\alpha_{steel} = 1.3 \times 10^{-5}/^\circC

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