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Day 44: MHT-CET Physics

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

  1. Question 1

    Structure of Atoms and Nuclei. This type asked 5 times: 23 Apr 2025 S1, 25 Apr 2025 S1, 26 Apr 2025 S2, 17 Apr 2026 S2, 19 Apr 2026 S2. This one: 19 Apr 2026 S2 See all 5 of this type

    147
    A radioactive element has rate of disintegration 16,00016{,}000 disintegrations per minute at a particular instant. After four minutes, it becomes 20002000 disintegrations per minute. The decay constant per minute is

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  2. Question 2

    Wave Optics. This type asked 5 times: 12 May 2024 S1, 23 Apr 2025 S1, 26 Apr 2025 S2, 11 Apr 2026 S1, 19 Apr 2026 S2. This one: 19 Apr 2026 S2 See all 5 of this type

    141
    A ray of light is incident at polarising angle θ\theta on air-glass interface. If λa\lambda_a and λg\lambda_g are the wavelengths of light in air and glass respectively then

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  3. Question 3

    Electromagnetic Induction. This type asked 5 times: 4 May 2023 S2, 11 May 2023 S2, 11 May 2024 S1, 14 May 2024 S2, 18 Apr 2026 S2. This one: 18 Apr 2026 S2 See all 5 of this type

    134
    Two coils A and B have 180 and 360 turns respectively. The current of 1A flows through both the coils. Due to current of 1A in coil A, flux per turn of 0.8×10−30.8 \times 10^{-3} Wb is linked with coil A. Due to current of 1A in coil B, flux per turn of 1×10−31 \times 10^{-3} Wb is linked with coil B. The self inductance of coil A is LAL_A and the self inductance of coil B is LBL_B. The ratio LAL_A to LBL_B is

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  4. Question 4

    Magnetic Fields Due to Electric Current. This type asked 5 times: 15 May 2023 S1, 9 May 2024 S2, 17 Apr 2026 S1, 17 Apr 2026 S2, 18 Apr 2026 S2. This one: 18 Apr 2026 S2 See all 5 of this type

    132
    A straight long wire is carrying current I. The ratio of magnetic field due to this wire at perpendicular distance 2 cm and 5 cm respectively from the wire is

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  5. Question 5

    Superposition of Waves. This type asked 5 times: 10 May 2023 S2, 11 May 2023 S2, 16 May 2023 S1, 14 May 2024 S1, 18 Apr 2026 S2. This one: 18 Apr 2026 S2 See all 5 of this type

    123
    A wire of length 'L' and linear density 'm' is stretched between two rigid supports with tension 'T'. It is observed that wire resonates in the PthP^{th} harmonic at a frequency of 320 Hz and resonates again at next higher frequency of 400 Hz in two successive modes. The value of 'P' is

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