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Day 420: MHT-CET Physics

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

  1. Question 1

    Semiconductor Devices. Asked once: 4 May 2023 S1

    35
    A semiconductor device X is connected in series with a battery and a resistor. The current of 10 mA is found to pass through the circuit. If the terminals of X are connected in reverse manner, the current drops to almost zero. X may be

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  2. Question 2

    Thermal Properties of Matter. Asked once: 2 May 2023 S1

    39
    The frequency νm\nu_m corresponding to which the energy emitted by a black body is maximum may vary with the temperature TT of the body as shown by the curves A, B, C and D in the figure. Which one of these represents the correct variation?

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  3. Question 3

    Thermodynamics. Asked once: 3 May 2023 S1

    35
    A diatomic ideal gas is used in Carnot engine. If during adiabatic expansion volume increases from VV to 32V32V, the efficiency of the engine is

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  4. Question 4

    Current Electricity. Asked once: 9 May 2023 S2

    31
    Potential difference between the points A and B is nearly

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  5. Question 5

    Electrostatics. Asked once: 14 May 2024 S2

    19
    A charge 17.7×10−4 C17.7 \times 10^{-4}\,\text{C} is distributed uniformly over a large sheet of area 200 m2200\,\text{m}^2. The electric field intensity at a distance 20 cm from it in air will be (ε0=8.85×10−12 C2/Nm2\varepsilon_0 = 8.85 \times 10^{-12}\,\text{C}^2/\text{Nm}^2)

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