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Day 320: JEE Mains Physics

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

  1. Question 1

    Work, Energy and Power. Asked once: 28 Jun 2022 (same type asked 3 times) See all 3 of this type

    95
    Water fall from a 40 m40\text{ }m high dam at the rate of 9×104 kg9 \times10^{4}\text{ }kg per hour. Fifty percentage of gravitational potential energy can be converted into electrical energy. Using this hydroelectric energy number of 100 W100\text{ }W lamps, that can be lit, is: (Take g=10 ms−2g = 10{\text{ }ms}^{- 2} )

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  2. Question 2

    Magnetism and Matter. Asked once: 25 Jun 2022 (same type asked 3 times) See all 3 of this type

    100
    Given below are two statements: Statement - I: Susceptibilities of paramagnetic and ferromagnetic substances increase with decrease in temperature. Statement - II: Diamagnetism is a result of orbital motions of electrons developing magnetic moments opposite to the applied magnetic field. Choose the CORRECT answer from the options given below: -

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  3. Question 3

    Ray Optics. Asked once: 2021 Paper 24 (same type asked 3 times) See all 3 of this type

    12
    A glass tumbler having inner depth of 17.5 cm17.5\text{ }cm is kept on a table. A student starts pouring water (μ=4/3)(\mu = 4/3) into it while looking at the surface of water from the above. When he feels that the tumbler is half filled, he stops pouring water. Up to what height, the tumbler is actually filled?

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  4. Question 4

    Semiconductor Electronics. Asked once: 2021 Paper 1 (same type asked 3 times) See all 3 of this type

    16
    If an emitter current is changed by 4 mA4\text{ }mA, the collector current changes by 3.5 mA3.5\text{ }mA. The value of β\beta will be -

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  5. Question 5

    Thermodynamics. Asked once: 26 Jun 2022 (same type asked 3 times) See all 3 of this type

    7
    The efficiency of a Carnot's engine, working between steam point and ice point, will be:

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