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Day 139: JEE Mains Physics

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

  1. Question 1

    Semiconductor Electronics. This type asked 2 times: 2021 Paper 20, 27 Jun 2022. This one: 27 Jun 2022 See all 2 of this type

    109
    For a transistor to act as a switch, it must be operated in

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  2. Question 2

    Units and Measurements. This type asked 2 times: 2021 Paper 20, 27 Jun 2022. This one: 27 Jun 2022 See all 2 of this type

    92
    The distance of the Sun from earth is 1.5×1011 m1.5 \times10^{11}\text{ }m and its angular diameter is 2000′′2000'' (2000 seconds of arc) when observed from the earth. The diameter of the Sun will be:

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  3. Question 3

    Work, Energy and Power. This type asked 2 times: 2021 Paper 21, 27 Jun 2022. This one: 27 Jun 2022 See all 2 of this type

    30
    A pendulum of length 2 m2\text{ }m consists of a wooden bob of mass 50 g50\text{ }g. A bullet of mass 75 g75\text{ }g is fired towards the stationary bob with a speed vv. The bullet emerges out of the bob with a speed v3\frac{v}{3} and the bob just completes the vertical circle. The value of vv is ____\_\_\_\_ ms−1ms^{- 1}. (if g=10 m/s2g = 10\text{ }m/s^{2} )

  4. Question 4

    Waves. This type asked 2 times: 2021 Paper 12, 26 Jun 2022. This one: 26 Jun 2022 See all 2 of this type

    106
    For a specific wavelength 670 nm670\text{ }nm of light coming from a galaxy moving with velocity vv, the observed wavelength is 670.7 nm670.7\text{ }nm. The value of vv is :

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  5. Question 5

    Thermodynamics. This type asked 2 times: 2021 Paper 26, 14 Jun 2022. This one: 14 Jun 2022 See all 2 of this type

    119
    A monoatomic gas performs a work of Q4\frac{Q}{4} where QQ is the heat supplied to it. The molar heat capacity of the gas will be ____ R\_\_\_\_\ R during this transformation. Where RR is the gas constant.