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Day 58: MHT-CET Physics

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

  1. Question 1

    Superposition of Waves. This type asked 4 times: 15 May 2023 S2, 21 Apr 2025 S2, 20 Apr 2026 S2, 15 May 2026 S1. This one: 15 May 2026 S1 See all 4 of this type

    121
    A transverse wave is propagating on the string. The linear density of vibrating string is 10−310^{-3} kg/m. The equation of the wave is Y=0.05sin⁡(x+15t)Y = 0.05\sin(x + 15t) where xx and YY are in metre and time in second. The tension in the string is

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  2. Question 2

    Kinetic Theory of Gases. This type asked 4 times: 4 May 2023 S2, 19 Apr 2025 S1, 12 May 2026 S1, 14 May 2026 S2. This one: 14 May 2026 S2 See all 4 of this type

    115
    Heat required to raise the temperature of 2 mol of an ideal gas at constant pressure from 25∘C25^\circ\mathrm{C} to 35∘C35^\circ\mathrm{C} is 310 J. The amount of heat required to raise the temperature of the gas through the same range at constant volume is (R=8.3(R = 8.3 J/mol K))

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  3. Question 3

    Motion in a Plane. This type asked 4 times: 19 Apr 2025 S2, 12 May 2026 S2, 14 May 2026 S1, 14 May 2026 S2. This one: 14 May 2026 S2 See all 4 of this type

    101
    The resultant R⃗\vec{R} of P⃗\vec{P} and Q⃗\vec{Q} is perpendicular to P⃗\vec{P}. Also ∣P⃗∣=∣R⃗∣|\vec{P}| = |\vec{R}|. The angle between P⃗\vec{P} and Q⃗\vec{Q} is (tan⁡45∘=1)(\tan 45^\circ = 1)

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  4. Question 4

    Rotational Dynamics. This type asked 4 times: 26 Apr 2025 S2, 15 Apr 2026 S1, 18 Apr 2026 S2, 14 May 2026 S2. This one: 14 May 2026 S2 See all 4 of this type

    106
    A solid sphere is rotating about a diameter at an angular velocity ω\omega. If it cools so that its radius reduces to (1n)th\left(\dfrac{1}{n}\right)^{th} of its original value, its angular velocity becomes

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  5. Question 5

    Semiconductor Devices. This type asked 4 times: May 2021 S1, 21 Apr 2025 S2, 11 Apr 2026 S1, 14 May 2026 S2. This one: 14 May 2026 S2 See all 4 of this type

    150
    The current gain in the common emitter mode of a transistor is 1010. The input impedance is 20 kΩ20\ k\Omega and load resistance 100 kΩ100\ k\Omega. The power gain is

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