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Day 79: MHT-CET Physics

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

  1. Question 1

    Superposition of Waves. Asked 3 times: 19 Apr 2025 S2*, 26 Apr 2025 S1, 18 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    122
    The fundamental frequency 'nn' of the tuning fork is 288 Hz, it will not resonate with the frequency

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  2. Question 2

    Electrostatics. Asked 3 times: 11 May 2023 S2, 26 Apr 2025 S2*, 18 Apr 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked

    126
    The point charges +q,−q,−q,+q,+Q+q, -q, -q, +q, +Q and −q-q are placed at the vertices of a regular hexagon ABCDEF as shown in the figure. The electric field at the centre of the hexagon 'O' due to the five charges at A, B, C, D and F is thrice the electric field at centre 'O' due to charge +Q+Q at E alone. The value of Q is

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  3. Question 3

    Superposition of Waves. Asked 3 times: 15 May 2023 S1, 22 Apr 2025 S2, 18 Apr 2026 S1 See all 3 times it was asked

    123
    The lengths of the two pipes open at both ends are L and (L+L1)(L + L_1). If they are sounded together, the beat frequency will be (vv = velocity of sound in air)

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  4. Question 4

    Wave Optics. Asked 3 times: May 2021 S1*, 16 May 2023 S1*, 18 Apr 2026 S1 (* = numbers or wording changed that year) See all 3 times it was asked

    143
    In a Fraunhofer diffraction of a single slit, when a slit is illuminated by a light of wavelength 6480 A˚6480\ \mathrm{\mathring{A}}, angular width of central maximum is measured. When the slit is illuminated by light of another wavelength 'λ\lambda' the angular width decreases by 25%25\%. The value of λ\lambda in A˚\mathrm{\mathring{A}} units is

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  5. Question 5

    Electromagnetic Induction. Asked 3 times: 16 May 2023 S1*, 9 May 2024 S2*, 17 Apr 2026 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    135
    Two coils having self-inductance L1=75L_1 = 75 mH and L2=48L_2 = 48 mH are coupled with each other. If the mutual inductance of the coils is 37.2 mH, then coefficient of coupling will be

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